Comments on It's the Rheo Thing: Confusion over "Vinyl"

Ben, I'm not sure what the rules are, other t...

2012-01-25T08:40:56.582-06:00

Ben,

I'm not sure what the rules are, other than what has traditionally been used - vinyl alcohol being an obvious example. As I hinted in the original post, it doesn't exist as it undergoes a keto-enol rearrangement to acetaldehyde.

That said, I would call acrylates a vinyl as they are mono-substituted, whereas the methacrylates are disubstituted.

"Allyl" refers to the 3-carbon entity H2C=CH-CH2-, so it has a vinyl group in it, but it is much more so than just a vinyl group. Allyl chloride would have to be called vinyl (methyl chloride) or some such monster.

Thanks for this post. I work with polymer chemist...

2012-01-24T18:42:15.788-06:00

Thanks for this post. I work with polymer chemists who talk about vinyl monomers and acrylate monomers as if the terms were mutually exclusive. So, for clarification, an acrylate is also a vinyl, but a methacrylate is not? Also, a vinyl ether is, obviously a vinyl ether and an allyl ether is also a vinyl ether?

Definitely an oversight on my part. If I would hav...

2012-01-24T13:43:06.035-06:00

Definitely an oversight on my part. If I would have taken an extra 33 1/3 seconds on the post, I might have remember to include it.

I'm used to listen at "vinyls" which...

2012-01-24T12:34:44.573-06:00

I'm used to listen at "vinyls" which are completely different, mostly 30 cm wide with a 7 mm hole at the center; black but not always, as in the case of the translucent green "Hunky dory" which is right now on the turntable...
Of course, chemical knowledge should not be such a subjective item.