What is localized pi bonding?

1 Answer
anor277
Dec 13, 2017

Consider "2-butylene" versus "1,3-butadiene..."

Explanation:

And so we gots....H_3C-CH=CH-CH_3 versus H_2C=CH-CH=CH_2. The pi-"bond" of the former creature is LOCALIZED between C_2 and C_3...and of course this could give rise to 2 geometric isomers, which are?

The pi-"bonds" of the LATTER are delocalized over 4-centres...certainly addition of 1 equiv HX would give rise to 1,4-"addition" to some extent....

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