User talk:V8rik/Archive 02

Image Tagging Image:Wittigrearrangement.gif

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• thanks for the notice I added a GFDL tag so the problem should be solved (created the image myself). When the article was created the copyright issue was still a bit confusing V8rik 23:10, 5 January 2006 (UTC)

Chemistry portal

Hi, I was wanting to used your picture of taxol for the highlighted picture on the chemistry portal (currently an enzyme pic). I was going to include the following text: "Paclitaxel is an important drug used for the treatment of cancer. Its complex structure provided a challenging target for its total synthesis by the Nicolaou group." Is this OK? Would you be willing make the drawing a little bigger (currently it's a bit small to use)? Cheers, Walkerma 07:40, 6 January 2006 (UTC)

• I have uploaded a new image: Talk:Nicolaou_Taxol_total_synthesis. If you have specific requests (color, size etc.) let me know and I will replace it. V8rik 20:02, 6 January 2006 (UTC)

Thanks, I have now uploaded it. Sorry it took a few days, my internet connection has been very iffy. If you want to make a colour version (in effect showing the retrosynthesis), similar to the picture I linked to above, I will upload that instead. I hope as well that it encourages folks to look at your page on the Nicolaou synthesis. Thank you, Walkerma 20:36, 9 January 2006 (UTC)

I included the color version as well. same location V8rik 21:01, 9 January 2006 (UTC)

Thanks, I'll post that. I am adding a comment about the colors relating to the synthetic approach, please tell me if that is wrong. Walkerma 18:07, 10 January 2006 (UTC)

Neighbouring group participation

Hi, I think that we have the start of a good article. Do you have any ideas of more material which we should add to the page ?Cadmium 22:13, 15 January 2006 (UTC)

• The article looks great and a welcome addition to organic chemistry. In terms of content to add I would like to suggest a stereochemistry example. In general I welcome references to original publications with links to abstracts for example those of Winstein V8rik 22:37, 15 January 2006 (UTC)

Hi, I think that on the NGP page that a distinction should be made between a tosyl group and a tosylate group as they are quite different in nature. For instance TsNH2 is very different to TsONH2. What do you think ? Cadmium 13:26, 17 January 2006 (UTC)

• I think the reference to tosylate on the NGP page is correct, the tosyl page could be expanded with more information on tosyl compounds. V8rik 16:41, 17 January 2006 (UTC)

Image Tagging Image:Schiff base.gif

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Image Tagging Image:Wackerprocess.jpg

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Titanium dioxide

I couldn't figure out why you didn't like the merge templates on titanium dioxide and titanium dioxide (B): their use seems perfectly legitimate to me. Physchim62 (talk) 17:02, 25 January 2006 (UTC)

• Hi Physchim62. I removed the merge notice for a number of reasons:

1. the merge notice was not motivated and the direction not specified (it should be a content move to titanium dioxide from titanium dioxide (B)) To me that is inappropriate use of the merge utility
2. titanium dioxide (B) is a technical topic with relevance to geology and nanotechnology and not of interest for a general article on titanium dioxide.
3. three other forms of titanium have their own pages.
4. from the record of user placing the notice I do not see any actual content additions
5. I have some general reservations regarding merges see User:V8rik#On_mergers

V8rik 17:35, 25 January 2006 (UTC)

• • Thanks for the justification, I will take a closer look at the titanium dioxide articles and see if anything needs doing (I have read your general reservations as well). Physchim62 (talk) 17:48, 25 January 2006 (UTC)

Image Tagging Image:M006701.gif

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Image Tagging Image:M0387.gif

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Image copyright problem with Image:Stereospecific_carbene_reaction.gif

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Image Tagging Image:Cannizzaro1.png

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{{biochem-stub}}

This template added GNRHR to the category Biochemistry stubs, that is a subcategory of "Biochemistry". So, yeah i had provided a category. Besides sending it straight to "Biochemistry" isn't the best way to categorize it. It should go to category 7TM_receptors <= (which is a subcategory of) Transmembrane_receptors <= Receptors <= Proteins <= Molecular biology <= Biochemistry, but after it is a stub no more. We just can't dump everything into the main category, what's the point of having a category tree then? So i'm reverting it back. -- Boris 02:49, 2 February 2006 (UTC)

Image Tagging Image:Kolbeschmitt.gif

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Image Tagging Image:Reaction-pinner2.png

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Image:BOC application.png

Hello V8rik, I was reading the BOC anhydride article that you started and noticed this image: Image:BOC application.png.

I would like to remove this image from the page for two reasons:

1. The synthetic steps subsequent the BOC-protection have nothing to do with BOC anhydride. IMO, the image only ends up confusing the reader and diluting the article.
2. The scheme is confusing and contains many errors.

A) It is difficult to tell the difference between isolated and unisolated intermediates.

B) The structures of unisolated intermediates were not studied, and probably should not be drawn. I would argue they should not be drawn, because we what can be drawn is not fact, but hypothesis. In any case, I believe the unisolated intermediates you have drawn are incorrect. (Second row on right is incorrect. Third row on the right probably does not exist.)

C) t-BuLi has only four carbons.

D) The mechanism of BOC deprotection is incorrect. Isobutylene is formed not t-butyl alcohol, and water is not in the mechanism.

If you feel strongly that retaining this image in the article is the best course of action, then I'm fine with that. However, if you do decide to keep the image, please fix it.

Sorry to be a bother. ~K 01:14, 7 February 2006 (UTC)

Hi, ~K thanks for your input, let my try to address your issues:

1. A. the page is about BOC anhydride in general and not just about the protecting agent. The example is included because the reaction product is an important food aroma in the maillard reaction.
2. B: the image is produced as a schematic with the aim to explain how the reaction works. Intermediates 4 and 6 in the new image are isolated and depicted in the Harrison article.
3. C: thanks for pointing out the wrong structure for t-BuLi
4. D: Intermediate 6 is isolated according to the article which makes isobutylene improbable. by the way, in the Solid_phase_peptide_synthesis (last image) the reaction product is a protonated isobutylene which should be target for criticism as well. Water is in the mechanism at some point because the TSOH is hydrated.

If you still feel the article lacks quality I will ask the admins to have it deleted. V8rik 21:45, 7 February 2006 (UTC)

Hey V8rik, Thanks for responding and numbering the image. Let me respond to each of your points:

1) I accept that. (Sometimes I'm easy to please.)

2a) Without reading the article you would never know which intermediates were isolated and which are hypothesized. I strongly suggest you do not draw hypothetical intermediates because you do not know the structure. If you feel the intermediates are necessary for discussion then enclose them with brackets: [].

2b) The product of the addition of the vinyl lithium to the amide is probably the tetrahedral intermediate, like the Weinreb intermediate. I think it's this because there's a neighboring BOC-group which can stabilize the tetrahedral intermediate in the same way the Weinreb amide stabilizes the tetrahedral intermediate. If the ketone (intermediate 3) was ever liberated it would instantly be attacked by the 2x excess vinyl lithium they use in the reaction. I believe the reason they quench the reaction at -78C is to avoid the collapse of the tetrahedral intermediate before the quench. (Note: The fact that we disagree about the structure of the vinyl lithium addition product tells me that it should not be drawn. The authors of the paper don't even discuss it.)

4a) Everything I know about BOC deprotection tells me that intermediate 6 was not isolated. (BOC group's strong resistance to nucleophiles including moderate stability in refluxing aq. NaOH) So I reread the paper and the supporting info. They do not isolate intermediate 6. They isolate intermediate 7. It is possible to push arrows directly from 5 to 7 without invoking 6 and giving off isobutylene.

4b) The image you refer to in the SPPS article is correct. They neglect to show the t-butyl cation giving off a proton to form isobutylene.

4c) TsOH is difficult to get anhydrous. It's cheap, stable, and easy to handle in its monohydrate form. Just because water is in the pot does not mean it's in the mechanism.

Lastly, I don't feel the image lacks quality. I'm just trying to correct what I feel are errors. Collaborative text is easy; collaborative images are difficult. And anyway, I enjoy debating this stuff because sometimes I learn something new. ~K 05:01, 8 February 2006 (UTC)

• Thanks again for your comments, I decided to make an attempt to save the content and skip any mechanism so the image is now a faithful copy of the Harrison article. My remarks;

1. authors of original papers lack space where wiki does not, so wiki can afford to write down a complete mechanism. Although not hypothesised in the article the current Wiki should present enough guidelines to fill in the blanks. This is not a violation of Not original research but in accordance with do not get technical. The average Wiki reader is not a chemist but should nonetheless be able to understand the content (see Aldol reaction discussion, I do not agree with the consensus reached there)
2. I have no problem with writing down the lithium compound as the lithium alkoxide but thanks for pointing out that lithium chemistry is far more richer than that
3. isobutene formation is the logic byproduct when accompanied with carbon dioxide formation but this is a different situation. any thoughts?

Sorry to take so long to get back to you. I think this is a cascading cationic cyclization. After the formation of the tetrahydropyridine, the vinyl ether is protonated. That cation is attacked by the BOC group. Finally, the molecule gives off t-butyl cation, which as you know makes isobutylene. This is just a theory, but plausible. ~K 17:25, 11 February 2006 (UTC)

1. thanks, you have me convinced. I will look out for new publications from this group and if they offer more details I can have the article updated. V8rik 18:08, 11 February 2006 (UTC)

1. concerning the water: the lithium intermediate is quenched in water after all
2. I generally try when constructing this type of images to account for all the atoms displayed All too often I see components just disappearing, take for instance the Weinreb article. I also try to keep track of counterions, many sloppy practices there, take for instance the article on choline were 10 editors find it perfectly okay to have a choline displayed without any counterion, (biochemists........). I also try to keep in mind that isolated protons and the likes do not exist and that there should always be a proton donor / acceptor somewhere in the reaction medium.
3. if the SPPS images displays reactants and products the presence of a t-butyl cation is dead wrong.

Image Tagging Image:Carbene1.gif

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Stille reaction

You deleted a lot of my writing on this article. Could you please put that stuff back? My student wrote the original article as a class assignment, and I had not had a chance to delete the obvious advert that he pasted-in from a manufacturer. I am not sure about if ChemDraw part is his or in violation. But(!) most of the text is my scholarly efforts and should not be removed. Thank you.Smokefoot 20:28, 12 February 2006 (UTC)

Hi Smokefoot, great idea to have your students contribute to Wiki. Wiki chemistry needs new content! If you want to reconstitute the article please feel free, my concerns though are:

• reaction bit partly taken from http://pages.unibas.ch/mdpi/ecsoc-3/b0007/b0007.htm the references of the original article still in place
• Scope part table taken from http://www.organic-chemistry.org/namedreactions/stille-coupling.shtm
• reaction mechanism image contains irrelevant advertisement and taken from ecompound.com without correct copyright notice
• Acros table is also a copyright issue and not an image I would expect to appear in Wiki
• links to mdpi and ecompound are irrelevant for stille reaction

V8rik 21:43, 12 February 2006 (UTC)

Got it. We'll dump most of it in that case, I sensed a problem and tried to rewrite it last night. We're not complete idiots - only partial ones - and have been pouring in content that I have tried to keep in order - Dess-Martin, SO2Cl2, NiCl2, FSO3H, sulfamic acid, MCPA (when I thought that I was assigning mcpba), Al(OPri)3, AgF2. Really appreciate your help. Smokefoot 21:58, 12 February 2006 (UTC)

• I checked out the Silver(II) fluoride article by Mogiemilly which looks great. I think students can really learn a lot by contributing to Wiki and help Wiki in the same time V8rik 22:50, 12 February 2006 (UTC)

• V8rik, Upon researching this topic, despite it being a very popular reaction, i had trouble finding resources that intimatly displayed the reaction process, and the few i did locate contradicted other resources. Therefore i used few sources when doing the research. I was not really aware of sci-finder and the other research utilities until lecture last tuesday. In addition, the tables and charts that i used were properly cited (or so i thought). i thought material may be distributed as long as the souce of the resarch was cited, which i thought i did. In response to the acros chart, I thought it would be helpful not only to show an industrial use, but rather a company that uses the specific reagents to carry out the Stille reaction. The table is public access because reagents are pattened and must be displayed for governmental approval. I am sorry if i misunderstood the copyright issues, i assure you that i felt that everthing i put in the artical was properly cited. I will definately take time to revise, and using the new research tools improve and display the page more to the expectiations of the wiki community. I do not mean to damage the integrity of the site, i simply felt i was doing everything appropriately. thanks for the info and i appologize if i did somethng wrong.

• Thanks for your reply (tip: if you type 4 tildes ~ in a row you leave your name). I understand you have received an introduction into getting your hand on scientific literature so I am looking forward to your new Stille coupling article. Good luck! V8rik 00:08, 14 February 2006 (UTC)

Look here. ~K 02:41, 14 February 2006 (UTC)

• Thanks for the help!

Metal Cluster

Hi V8rik,

Here's some info I've written for the topic of metal clusters. I saw you had editted the article previously. Perhaps you'd like to merge this information into the article. I don't really have the time. My contributions are part of a course I'm taking at UIUC.

Reduction of [PtCl₆]^2- in an atmosphere of CO provide a series of stacked Pt₃ triangle clusters, [Pt₃(CO)₆]_n^2- in slightly twisted columns. The interesting aspect of these platium clusters is that they have fewer electrons that one would normally finding using electron counting rules. For n = 1 and n = 2 counting rules predict 48 and 90 electrons respectably, however these compounds only have 44 and 86. The inconsistancy in electron counts for these compound can be attributed to the large energy gap between the 6s and 6p orbitals in this part of the periodic table. This gap in energy causes skeletal bonding in these compounds to be reduced in p-character.(1)

(1)

1. Earnshaw, Greenwood. Chemistry of the Elements. Second Edition. Elsevier Butterworth-Heinemann. New York. 2005

• Thanks Rhelmich, but that is not how Wiki works, and editing this material into the cluster article yourself would not have cost you more time than making this edit!. V8rik 18:03, 27 February 2006 (UTC)

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Thanks for the formatting changes on tetrasulfur tetranitride. I really had no clue how to get the chemical equations out of those boxes and into the text in standard format.

Polythiophene

Hi, V8rik I saw your comment on the talk page of Polythiophene and thought you had a fair point. There is a mechanism for dealing with objections like that, and that is by listing it at Wikipedia:Good articles/Disputes so it gets a review. Regards. SeanMack 10:59, 24 March 2006 (UTC)

• Thanks for the comment, I have entered my objection on said page. V8rik 17:19, 24 March 2006 (UTC)

• Hi, I read your comments and looked through some of your articles to get an idea of what you meant by "link density". Thanks for the suggestion. I still want to revise the introduction, but I'll make another pass through it to add some links and make it more Wiki-friendly. I'm a bit contrained to add text because it took a while to get all the references in and working properly, and I don't want to get them out of order. Cheers, Dflanagan 17:05, 25 March 2006 (UTC)

citrinin

you have changed category to mycology, thats ok, but citrinin is also a biochemical reagent ! Also, why have you removed the STUB classification? what I wrote was a "preliminary"

• as long as there is at least one category, it is also possible to list more than one category. V8rik 22:01, 28 March 2006 (UTC)

Nicodem vs Heinrich

V8rick - I'm the bloke that inserted Nicodem for the Caro of Caro-acid fame, but it looks like you know that Heinrich is the one. I had guessed , apparently incorrectly, that there was but one Caro at work in Berichte-land in the late 1800's. I'd like to do more digging (sometime ...) , but thank you for your graceful attentiveness.Smokefoot 04:18, 19 April 2006 (UTC)

Hi, Smokefoot I will try to do some additional research on Caro and find a reference. btw, any word on the Stille article? V8rik 17:09, 19 April 2006 (UTC)

wikifaction of transfer hydrogenation

thanks for taking care of that for me. The images already have the appropriate references attached to their pages.

• I now see that the references were included with the image, thanks, but I do not think that this is the generally accepted way to process them, I think they should be in the text itself. V8rik 16:33, 23 April 2006 (UTC)

Removal of unverified tag at Geometric isomerism

Hi, I noticed you removed the unverified tag at Geometric isomerism. I'm not sure if you realised, but it related to a specific issue with trans compounds having higher densities (as discussed on the Talk page). I've left it as is for now, so if you could verify the issue that would be great! Thanks... -postglock 05:10, 27 April 2006 (UTC)

• I see your point but to me the unverified tag indicates that the entire article lacks sources and not just one element. I made up for it and expanded a bit after consulting March but he does not specifies anything on densities other than to state that there are differences. Therefore I left the density statement with a tag so that it is left to another wiki editor to fill in that one. V8rik 20:56, 27 April 2006 (UTC)

Ok, that's great. I know what you mean, I wasn't sure what tag one was meant to use, and I realise the one I put in wasn't exactly the most appropriate. Thanks. -postglock 14:24, 28 April 2006 (UTC)

Give us 2 weeks

V8rik, please give my kids about 2 weeks on their wiki projects. The student output will be uneven. and you are welcome to nudge them on their deficiencies but the responsiveness will be uneven (senioritis). The list of projects is on my talk page, Me2SO4 is one of them. In general we should get some decent content to work with once they are done. Thanks,--Smokefoot 00:02, 28 April 2006 (UTC)

• I will constrain myself and check with your talk page. Keep up the great work you are doing! V8rik 14:56, 28 April 2006 (UTC)

Thanks for keeping us up to date!

Free beer!

Hi, I wanted to thank you for getting that Corey synthesis of Oseltamivir on to Wikipedia only 3 days after it appeared on ASAP, well done! I also appreciated you adding it into the Chemistry portal. Any time you are in Potsdam, New York (or if I see you at Wikimania), I will buy you a beer. Many thanks, Walkerma 04:25, 30 April 2006 (UTC)

• Well, thanks! V8rik 17:02, 30 April 2006 (UTC)

Thanks

I should have thought of that one for electron counting .. I was on my way to chemical categories, but this sums it up quite nicely ;-). Cheers! Dirk Beetstra 20:27, 16 May 2006 (UTC)

rita verdonk

How can you say "Rita Verdonk is also labelled Rode Rita or Red Rita" when that article is only 4 days old? Intangible 16:25, 23 May 2006 (UTC)

• Hi, Intangible I believe the phrase already existed before the article and certainly the rumours/gossip have been around for years. If you feel the first line is incorrect how about: In a 2006 article V. was labelled as etc.

V8rik 16:46, 23 May 2006 (UTC)

Benzothiazole

This guy is a two-ring system, thiazoles have one. Why would you want to mix these up? -- Boris 04:43, 12 June 2006 (UTC)

• I added the line in order to show the relationship between the two. Replace it with a See also line? V8rik 16:25, 12 June 2006 (UTC)

Yeah. That would work. Thanks. -- Boris 00:12, 13 June 2006 (UTC)

Done....... V8rik 16:47, 13 June 2006 (UTC)

Bond energy

Hello V8rik. I wanted to bring your attention to a recent anonymous edit to one of your contributions to the Bond energy article. The editor replaced some of the values with values using SI units (kJ), which seems reasonable. However, the CRC Chemistry and Physics Handbook reference was removed and the CH3-X bond energy info was removed. It would probably be best to either restore the original numbers and provide an appropriate conversion factor in the text or replace the unreferenced values with the CRC values converted to kJ/mol. However, I do not know what definition for calorie the CRC handbook uses for this information. Do you happen to know which definition the CRC handbook uses so the appropriate conversion factor can be used? Thanks!--GregRM 14:17, 8 July 2006 (UTC)

Hi, GregRM Thanks for pointing out that edit for me, I have missed it somehow and I disagree with that edit. I have made a new edit with the Handbook values replaced and the reference to the handbook. The handbook gives the values for most molecules both in Kcals and KJ's and I have rounded the values. Please note that although joules are SI, current organic chemistry literature uses calories!

Many thanks V8rik 17:18, 8 July 2006 (UTC)

Great...thanks!--GregRM 17:22, 8 July 2006 (UTC)

ChemicalSources

Hi V8rik,

Although the original intent of the Wikipedia:Chemical sources page is indeed to remove the suppliers from the pages itself, it can also conveniently give links to e.g. MSDS and spectroscopic data (e.g. SDBS and the Aldrich spectra), so I think that it is also of use on pages of non-commercially available compounds. I have reworded the ChemicalSources template a bit to reflect this. Now I must confess that finding cavicularin somewhere might be quite difficult, but I also had quite a job finding a certain ISBN on the Booksources page, most links were yielding no results. --Dirk Beetstra ^{T C} 06:16, 14 July 2006 (UTC)

Statistical Properties

First of all, let me point out you likely know more about chemistry than I do, so let's not get into that argument. I'll still remind you that the atomic weights are a weighted average based on the historically measured distribution of isotopes. The melting point, boiling points and others are almost always assumed at room temperature and pressure, and under earths magnetic field and no other. The vibrational modes and handedness of the molecules are all averages unless specifically noted to be considered a seperate chemical species. For some really interesting views on why that is so important, read up on diamond, which has a much higher thermal conductivity when you only use a single isotope. Hope that makes sense. Seems like you are at a different level than beginning chemistry. I will always be down at the bottom, so these things are fresher for me. Tmcsheery 23:06, 27 July 2006 (UTC)

• Hi Tmcsheery, Everyone is invited to edit in Wiki regardless of experience in chemistry. I understand what you mean now. I associated a statistical property with something like molar mass distribution. On the other hand I think your statement should not be included in the actual definition of chemistry. It should be very appropriate in the introduction section of chemistry together with the background you presented above V8rik 17:15, 28 July 2006 (UTC)

re categorizing organic reactions

Of course you're welcome to change the categorization system. I just made some broad, obvious categories based on the net result of the reaction, so it can definitely be improved. In fact we should probably categorize reactions based on more than one aspect: stepwise or concerted mechanism, what kind of intermediates, etc. A giant category with no subcategories, however, is not really in the spirit of the Wikipedia categorization system. Consider: if you know the name of the topic you're trying to look up, you can just type it in. Categories are for the times when you don't know the name, so you try to find it among similar articles. Besides, if you just want an alphabetical list, List of organic reactions already serves that purpose. Special:Recentchangeslinked works on that just as well as the category. —Keenan Pepper 19:34, 31 July 2006 (UTC)

Helicene and tetrahedrane images

Hi V8rik, thanks for commenting on my talk page. I was surprised to read that you found Image:Hexahelicene-3D-vdW.png and Image:Tetrahedrane-3D-balls.png hard to see properly - they look fine on my monitor. Do you have particularly dark settings on your screen, or do I have very bright ones? Regardless, I'll be more than happy to adjust the lighting in those particular images (although I might have trouble changing all 1000 or so molecules I've uploaded), just give me 24 hours or so (I'm about to go to bed!). And I'd love to create some images for synthetic molecular motors.

Best wishes

Ben 00:31, 6 August 2006 (UTC)

Hi Ben, Do not start reworking all your images because I say so, it is very possible that it is due to the quality of my screen or screen settings. My brightness was 30% and with 80% brightness it already improves. I will check out some random computer screens next week to see how the images look there. V8rik 16:44, 6 August 2006 (UTC)

Chemistry Group?

I have notice that they are certain users that clearly have expertise in chemisty including yourself and Benjah-bmm27. I was wondering if it would make sense to start some kind of chemistry group where we could all discuss things. I think this would be helpful. I wondered if you agreed. Do you think that such a thing is possible? M stone 01:02, 13 August 2006 (UTC)

• Hi M stone, you are absolutely right, it is important to have an chemistry discussion group and there is one in fact although I have to admit that I have thus far neglected it.

[[The project page is Wikipedia:WikiProject Chemistry and the active discussion group: Wikipedia talk:WikiProject Chemistry

I think I will get more involved in their discussion so I will meet you there! V8rik 16:07, 14 August 2006 (UTC)

OK this is a bit overwhelming. I am not sure I am ready to see just how deep the rabbit hole goes yet. I did not see an organic area. Does one exist? This might be a bit more manageable. M stone 16:38, 14 August 2006 (UTC)

Sorry

Oops. You are right, carbomer is not exactly a stub (so why is it on Alai's list, anyway??). Sorry 'bout that! --Dirk Beetstra ^{T C} 20:58, 20 August 2006 (UTC)

Don't be! I am fighting a long long war against stubs in general, see my user page V8rik 21:35, 20 August 2006 (UTC)

I knew the text on your user page. But this was a mistake. Now decided to have a closer look at Alai's list, and I must say, removed quite some stub-marks, instead of resorting them. Only a couple of 100 pages on his list. --Dirk Beetstra ^{T C} 21:41, 20 August 2006 (UTC)

Free Radical

No it's not an advertising platform, but the redirects are supposed to redirect you to the most relevant information.

"Free Radical" is the short name of "Free Radical Design", were'as redirecting to "Radical (chemistry)" from "Free Radical" is even less relevant. I changed this because it made more sence, not for advertising purposes. Manix 09:46, August 29, 2006 (GMT)

• Hi unknown, (please sign your comments with 4 tildes (~)), agreed my views on advertising in Wiki are personal but it is in the interest of wiki to reduce unnecessary links: one disambiguation page (radical) should be enough. Also you cannot have two redirects in a single page so I had to edit it anyway V8rik 20:27, 3 September 2006 (UTC)

• Thats fair. Sorry for any problems I may have caused. Also, i'm new to commenting on "Discussions", so i hope my edits make it a little clearer who i am. Manix 10:15, September 29, 2006 (GMT)

Nucleation

If you have a moment, would you mind reviewing recent edits to the Nucleation article? One of the editors has very few edits, and none of them have been particularly useful to Wikipedia. Rklawton 04:20, 3 September 2006 (UTC)

• Hi Rklawton, I know little on this topic but I know it is not fair to drop a highly technical topic such as spinodal decomposition onto a basic nucleation article. Also nucleation is definitely a phenomenon taking place in polymers, see reference added. That was all I was able to do, hope it helped. V8rik 20:22, 3 September 2006 (UTC)

Corrole picture

There is a missing nitrogen (top right hand) from one of your pyrrole rings for the intermediate molecule of the Corrole synthesis diagram.

Jjd323 10:59, 4 September 2006 (UTC)

Hi Jjd323, thanks for spotting the mistake, I have uploaded a revised version. V8rik 18:34, 5 September 2006 (UTC)

Retinal molecule

Hi V8rik, I notice that you can make molecule diagrams fairly easily. Would you mind making one for the retinal molecule, to show how it changes from 11-cis retinal (bent) to all-trans retinal (straight) when it receives a photon. See: rhodopsin or opsin.

If you make the image, I’ll write the article. I can scan and send you a couple of textbook images of retinal, straight and bent, if you like. P.S. thanks for making the molecular tweezer image; I utilized it for a humorous article:

• Who is the Host and Who is the Guest in Human Relationships? (humor)

If you are interested in making this molecule, I would appreciate it. Thanks: --Sadi Carnot 19:22, 14 September 2006 (UTC)

• there you go.....

Retinal

If you are interested in making your own images see the very helpfull instructions in Wikipedia:WikiProject Chemistry/Structure drawing

V8rik 20:31, 15 September 2006 (UTC)

V8rik, thanks much for the help. I'll use it, over the next week, to clean up the retinal, opsin, rhodopsin, photon, and vision articles. Also, thanks for the tip on those structure drawing links; I'll see if I can learn to make them myself. The photon induced retinal-bending mechanism you made was discovered in 1958 by the American biochemist George Wald and his co-workers. Within 200 femtoseconds after retinal has absorbed a photon, the 11-cis retinal is transformed into the all-trans retinal. This conformational change results to trigger an electrical impulse, which is sent to the brain for processing. Thanks again: --Sadi Carnot 13:19, 16 September 2006 (UTC)

P.S. do you think you could put the symbol $\gamma \!$, i.e. the Greek letter gamma, over the arrow? So far, I've used your image to start the "retinal" article. Thanks:--Sadi Carnot 14:12, 16 September 2006 (UTC)

Super! --Sadi Carnot 13:48, 17 September 2006 (UTC)

Enzyme kinetics

Hi V8rik. Thank you for your input on this article, if you have any more comments or suggestions, it is up for FA candidacy and the discussion page is here. Thank you. TimVickers 20:47, 28 September 2006 (UTC)

Image:N-methylmorpholine-N-Oxide.gif listed for deletion

An image or media file that you uploaded or altered, Image:N-methylmorpholine-N-Oxide.gif, has been listed at Wikipedia:Images and media for deletion. Please look there to see why this is (you may have to search for the title of the image to find its entry), if you are interested in it not being deleted. Thank you. Nv8200p talk 04:16, 30 September 2006 (UTC)

special:chemicalsources

Hi! I just decided to spam some people directly, who I know are very active on chemicals. There is now a wiki running on http://chemistry.poolspares.com (a site created by Nickj from the wikimedia IRC channel, the site will be taken offline again in a couple of weeks), where I have now hosted a small wikipedia. It runs two extensions I have written to the wikipedia software, a special page (for chemical sources, see also wikipedia:chemical sources and a chemform tag (for easy input of chemical formulae). Could you have a look, and comment on it (if useful I would like to try to let Tim or Brion enable it on wikipedia, though I feel some resistance there). Cheers! --Dirk Beetstra ^{T C} 17:52, 26 October 2006 (UTC)

WP:FAC

Yoh, V8rik, I just put the lead(II) nitrate article up for FA-class. Feel free to contribute your support. Wim van Dorst (Talk) 20:58, 2 November 2006 (UTC).

Discussion of Theoretical plate revision

V8rik, I am very pleased that we agree on the revisions to the Theoretical plate article. Please see my response to you on Talk:Theoretical plate. Regards, mbeychok 18:02, 10 November 2006 (UTC)

Theoretical yield

Hi, I undid your change of the theoretical yield article to a redirect. I think a proper page merge is warranted rather than just deleting the article, so I proposed the merge. Please consider adding the content from theoretical yield to yield (chemistry) rather than just deleting it. Robotsintrouble 02:21, 21 November 2006 (UTC)

• Hi Robotsintrouble, fair criticism, my response on the talk page

Portal

Thanks V8rik, I've replied to your comments here. Cheers! riana_dzasta 09:28, 22 November 2006 (UTC)

Inflammable

I don't know why you reverted back to flammable in Nitrous oxide article... it is the same. see here and here. kind regards --Alnokta 03:08, 24 November 2006 (UTC)

• Thanks Alnokta, for straiting me out, I was apparently incorrect or not correct to avoid more confusion. To my defence I can only state that I am a non-native English speaker. I switched back my edit and linked to Flammability. V8rik 15:58, 24 November 2006 (UTC)

You welcome, I speak English as a second language too. I just had a tough teacher ;)--Alnokta 21:42, 24 November 2006 (UTC)

Please read comment on Talk:Theoretical plate

Please read my comment about "Simple Analogy" section. Regards, mbeychok 16:47, 25 November 2006 (UTC)

• Boy, I so much regret starting the theoretical plate article and my whole participation in the distillation collaboration of the month. I will skip the remainder of it. For the record: analogies are useful tools in Wiki trying to explain certain concepts to non-technical people. I for one intent to write for a general audience and not primarilary for fellow chemists and certainly not for chemical engineers. Also for the record: I have + 2000 edits to my name focused at adding new material to Wiki and not just endless talk page discussions so I take offence when I am yelled at in bold and portrayed as somebody a just cracking jokes. Apparently when you infringe on the property of chemical engineers, manners deteriorate rapidly. V8rik 18:38, 25 November 2006 (UTC)

I did not see this reaction before I read the talk-page of Theoretical plate, I have added a reaction on the talk page of theoretical plate. I do fully agree with you, chemical engineers seem to break all good effords down to 'comic strip' or 'cracking jokes', they seem unable to think in simple analogies. Sorry to hear you pull your hands from this, we certainly can use all hands to refrain chemical engineers from turning all general chemistry subjects into hard-boiled, unreadable articles. Really hope to see you around! --Dirk Beetstra ^{T C} 20:04, 25 November 2006 (UTC)

Feringa group

Hi, I came across some articles and images you created, such as (Bis(trifluoroacetoxy)iodo)benzene, the Barton-Kellogg reaction and this B-K image. So I was just wondering if you are, or if you have been, a part of Feringa's group or if you're just interested in the motors they created, since all of these things are "Feringa-motor" related... -- Sander 21:55, 27 November 2006 (UTC)

Hi Sander, call me a fan or a groupie. I like the motors a lot but never set a foot in the Groningen lab. V8rik 22:15, 27 November 2006 (UTC)

You should! It's a nice lab, a nice working atmosphere and there are many nice people. And ofcourse the chemistry is great too ;) -- Sander 18:05, 1 December 2006 (UTC)

Beautiful, beautiful...

Just beautiful: Nicolaou Taxol total synthesis. Your contributions to Wikipedia are simply invaluable! --HappyCamper 00:19, 1 December 2006 (UTC)

• Thanks!, btw the Wender Taxol total synthesis is in the making. V8rik 16:27, 1 December 2006 (UTC)

verdonk

The information you added was all wrong. The motion was not about a general pardon, but only about suspending extraditions until a new cabinet can rule on a general pardon. And no, Verdonk has not resigned, and probably will not after this night. Intangible2.0 23:59, 12 December 2006 (UTC)

• No, the december 1 motion was about the pardon see: 2006 Dutch cabinet formation, then followed other motions with different content. The bit of information on possible resignation is already toned down in the text. More on the Talk page V8rik 00:09, 13 December 2006 (UTC)

Chemical Citizen of 2006: Wikipedia User “V8rik”

You won! Congratulations :) Chemical Citizen of 2006: Wikipedia User “V8rik" Mitchandre 16:34, 27 December 2006 (UTC)

Well deserved! Congratulations! Walkerma 02:16, 28 December 2006 (UTC)

• • Hi all, I have been taking some vacation (stomping around in Belgian mud) so I was not able to reply sooner. Many thanks for the Chemmy Award for Citizen of Year at http://blog.chembark.com (consider this my acceptance speech), I feel proud. V8rik 19:42, 29 December 2006 (UTC) PS I do actually look a lot like the guy in black with the question mark

your work has set a high standard - in technical content and philosophical style - that will have a lasting impact, Congrats--Smokefoot 05:41, 30 December 2006 (UTC)