Got an image of a couple types. I don't have anything to pack them with right now, but I'll try to grab another picture of one when I do. Bfesser03:49, 25 February 2007 (UTC)[reply]
For alkane article please can I have the all possible C4-alkane isomers (i.e. n-butane, isobutane, cyclobutane and methylcyclopropane as a composite image. Also do anyone think it is reasonable to include the cyclobutane with a bridging carbon-carbon bond (i.e. like two triangles back to back) - does it even exist as an intermediate? Currently there is an incomplete list of all possible C5-isomers on the alkane page. I'd like to replace that image with the one requested. Also, we are typing to make alkane a featured article, it would be great if you can make the iamge nice on the eye. -- Quantockgoblin00:40, 6 February 2007 (UTC)[reply]
- done (at low-ish resolution) - I'm sure someone can do it at higher and with svg?
Actually before you kindly do anything, I've just thought, are cyclic alkanes strictly isomer of straight chain alkanes e.g. hexane C6H14 and cyclohexane C6H12 have different chemical formula! If they are not isomers (which now I suspect) then maybe I don't need the image as it is factually incorrect. The 'isomers' I have drawn are just C4-analogs!?! --Quantockgoblin21:45, 11 February 2007 (UTC)[reply]
Cycloalkanes are isomeric with alkenes - they have the general formula CnH2n. What you want are all the possible isomers with formula C4H10.Ben21:48, 11 February 2007 (UTC)[reply]
The section Benzopyrene#Interaction with DNA just got a {{confusing}}, and I can see why, the text is heavily invested with chemical formulae, which makes the section unreadable for many people. I think that an reaction scheme (and a rewrite of that section) would clarify a lot, there (I can help with the rewrite, if you want). --Dirk BeetstraTC10:57, 17 December 2006 (UTC)[reply]
Could someone please replace Image:Con polymer.png with a version that has licensing and source information? I would tag it with {{subst:nld}} and {{subst:nsd}}, but I doubt whether this image can be deleted (due to technical concerns). Thanks. MER-C 08:17, 18 February 2007 (UTC) (copied from wikipedia talk:wikiproject chemistry Dirk BeetstraTC09:27, 18 February 2007 (UTC)).[reply]
Uracil seems to have a problem, a user left the note "This scheme and the sentence are wrong : a tautomeric equilibrium is between two different molecular forms (as shown, with proton(s) transfered from one site to another), but a double arrow must be used. Resonance structures show the electrons (usually pi electrons), for an unique molecular structure, localized in different parts of the molecule. This is symbolized by the arrow with two heads as on this drawing. The resonance theory helps understanding the stability and reactivity of molecules. The two molecules shown have each their own resonance structures.". --Dirk BeetstraTC17:08, 20 February 2008 (UTC)[reply]
I added in the scheme from iodomethane, with a little explanation. Maybe you also want a schematic of a biochemical methylation, too? That's out of my field...Walkerma16:30, 20 March 2007 (UTC)[reply]
Photo of a stable carbene. This is a bit of a wild request, but if people are still in the habit of subliming stable carbenes, perhaps they could take a photo and upload it. A nice way to sublime these carbenes (when free from metals) is to place a tight fitting rubber filtration cone (the sort used for getting a good seal when using a Buchner funnel) half way up the outside of a schlenk tube and fill it with dry-ice acetone and gently heat the crude solid carbene in the bottom of the schlenk tube with warm water whilst applying a vacuum. The carbene sublimes as a nice white band, perfect for a photo. I would do it myself, but I'm no longer in the lab. Quantockgoblin18:00, 14 November 2006 (UTC)[reply]
A nice picture for {{chemical drawing needed}} (I would like to use this template outside the infoboxes to request images on chemistry pages where a picture would e.g. improve the explanation or replace wrong images with this template). Feel free to make something beautiful! --Dirk BeetstraTC15:23, 4 March 2007 (UTC)[reply]
Xray structure is reported in doi:10.1107/S0567740873006060 but I don't have access to that one or know where to find its coords online. Could probably fake it from the DMSO adduct Xray in doi:10.1007/s00775-005-0031-3? Probably better to have just (ball-and-)stick instead of real VdW space-filling since it's such a clustery thing. DMacks08:26, 17 April 2007 (UTC)[reply]
A graphic and/or a photograph of a (e.g. THF) still, used for distilling off solvents from a pot containing a desiccant/oxygen scavenger. The still I have in mind, from the bottom:
pot with a second neck for adding sodium and more solvent
pressure-equalizing dropping funnel modified with a neck (replace stopper with septum against N2 flow to draw off purified solvent)
Wanting to make a infobox for chemistry topics which looks similar to the Cuisine feel of infobox; would require a picture or diagram of something which personifies chemistry in both practical and theoretical instances. So, something like a beaker, Erlenmeyer flask, chemical formulae or notable chemist, just give a little more "oomph" to the wikipedia chemistry articles. JCraw13:22, 27 November 2006 (UTC)[reply]
or maybe a bit chemistry apparatus "as seen on TV" e.g. (although I would need all the bits to be in the wrong order and some dry ice in there somewhere too!!):
or
or
or - just as a sort of idea, can be fancied up a bit?
- I don't have the skills to do this well but it's an idea that could be used?!
Not sure this thread is still "alive" but here are a few more sketched ideas (too physics-y?):
The triene designation refers to the signature ultraviolet spectrum due to three conjugated double bonds. The subscript denotes the total number of double bonds - four when derived from arachidonate.
I took a hand at drawing the various crystal field splittings using Dia but they look ugly. I was wondering if anyone would be willing to draw the diagrams for
I think DMSO is often misrepresented as planner (i.e. sp2 at S). The S is tetrahedral like oxygen (SP3). The nice images on the DMSO pretty much give this impression, as does the image on the D-DMSO page. I would like someone to fix the images so they are more representative of the real sp3 S-center -- thanks Quantockgoblin12:55, 18 April 2007 (UTC)[reply]