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The molecule that contains only sp^(2) h...

The molecule that contains only `sp^(2)` hybrid carbon atoms is

A

isoprene

B

acrylonitrile

C

but-1-ene

D

1,3-butadiene

Text Solution

Verified by Experts

The correct Answer is:
D
Double bonded carbon atoms are `sp^(2)` hybridised. The structures of the given compounds are as
(a) `overset(sp^(2))(CH_(2))=overset(sp^(2))(CH)-undersetundersetundersetunderset("isoprene")(sp^(3))(CH_(3))(|)overset(sp^(2))(C)=overset(sp^(2))(CH_(2))`
(b) `underset(sp^(2))(CH_(2))=undersetunderset("acrylonitrile")(sp^(2))(CH)-underset(sp)(C)-=N`
(c ) `overset(sp^(3))(CH_(3))-underset("but-1-ene")overset(sp^(3))(CH_(2))-overset(sp^(2))(CH)=overset(sp^(2))(CH_(2))`
(d) `overset(sp^(2))(CH_(2))=overset(sp^(2))underset("1,3-butadiene")(CH)-overset(sp^(2))(CH)=overset(sp^(2))(CH_(2))`
(e) `overset(sp^(3))(CH_(3))-undersetundersetundersetunderset("iso-butene")(sp^(3))(CH_(3))(|)overset(sp^(2))(C)=overset(sp^(2))(CH_(2))`
Thusm 1,3-butadiene contains only `sp^(2)` hybridised carbon atoms.
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