|WikiProject Chemistry||(Rated Start-class, Mid-importance)|
How do you pronounce Ylide?
Is it like "Why-lide" or "Elide" or "Illide"? Or is it something totally different?RSido 21:45, 3 May 2007 (UTC)
- I think it's pronounced "EE-lide" because it's a combination of -yl (as in carbonyl), pronounced "ill", and -ide (as in chloride). I looked it up and couldn't find proof, but Ylangylang also begins with "EE". Shalom Hello 22:11, 19 September 2007 (UTC)
Ylide is pronounced ILL-ide (long i); see the OED, if you can figure out their pronunciation guide. The Brits generally use ylid, which is pronounced with a shorter i, as ILL-id. 30 April, 2008. —Preceding unsigned comment added by 126.96.36.199 (talk) 00:29, 1 May 2008 (UTC)
In what way do you want an ylide to be an FG? ChristianB 22:21, 1 December 2007 (UTC)
Is it really spelled with an E by some in the U.S.? I'm a molecular biology Ph.D. student (American) and I've never seen it as anything except ylid. Not that this means much... --aciel (talk) 01:13, 16 December 2007 (UTC)
- I've always seen it as ylide, and that's the way it's spelled in a couple of IUPAC glossaries. --Itub (talk) 12:21, 17 December 2007 (UTC)
- I've always seen it as ylide also. When I first read this article, I thought ylid was a typo as I've never seen it spelled that way in textbooks. --188.8.131.52 (talk) 02:23, 8 October 2009 (UTC)
Are nitro compounds considered ylids? They fall within the definition given in the article, and are very common, yet are not mentioned.
Relation to zwitterions
Can we get some agreement on the argument currently taking place on the article's page regarding whether or not a stabilized ylide is reactive with both carbonyl species? The "NO IT IS NOT" is rather ridiculous. —Preceding unsigned comment added by 184.108.40.206 (talk) 20:37, 12 October 2010 (UTC)
- editors are entitled to question statements made in an article but protocol demands the use of the  tag and not simply stating this is not true I have made the switch, now we need a credible citation for this statement V8rik (talk) 17:28, 13 October 2010 (UTC)
The section in question here does need some re-writing. The text as it stands is an over simplification and somewhat misleading. Consider, for example, that triphenylphosphonium benzylide (a "stabilized" ylide) does react with benzophenone (a stabilized ketone!) to give the triaryl substituted olefin. (see Journal of the Chemical Society, Perkin Transactions 1: Organic and Bio-Organic Chemistry, (4), 849-58; 1984) Or that triphenylphosphonium carboethoxy stabilized ylides do react with the ketone moiety of phenanthraquinone (albeit an activated ketone) (see Can. J. of Chem. 1964, 42, 190.) A good summary of this reactivity is available in "Ylides and Imides of Phosphorus" by A. William Johnson (1993) John Wiley & Sons, NY,ISBN 0-471-52217-1. Also, and very importantly, a phosphonate-stabilized carbanion of a Horner-Wadsworth-Emmons reaction is not an ylide (phosphonium ylide). Perhaps the original author here would want to revise his (or her) text. Pnicto-boy (talk) 21:36, 13 October 2010 (UTC)
- I assume this is the GoldBook ref you meant for the def of the term "ylide"? I think you're mis-reading it: the Wittig/phosphonium-ylide is not sextet and it is not a 1,3-dipole. The specific GoldBook def is 1,2-dipole, "i"f X is a second, third, etc. row element uncharged canonical forms are available RmX=YRn", etc. I think the "e.g." in the def is for what is, not for the preceding sentence of what isn't. But it doesn't matter what I think so much... IUPAC defines a phosphonium ylide for us. DMacks (talk) 17:10, 18 December 2010 (UTC)