Question

In propene all carbon-carbon bond lengths are equal

Answer 1

Angles around the carbons in the double bond are ~ 120º. Thus, all of the atoms bonded to the sp2 hybridized carbon lie in a plane. Carbon-Carbon double bond length is ~ 1.34 Å (single bonds in alkane are ~ 1.54 Å.

Answer 2

• Carbons in the double bond of butene are sp2 hybridized.

• Side on p-p orbital overlap creates a π-bond.

• Angles around the carbons in the double bond are ~ 120º. Thus, all of the

atoms bonded to the sp2  hybridized carbon lie in a plane.

Carbon-Carbon double bond length is ~ 1.34 Å (single bonds in alkane

are ~ 1.54 Å.