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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