Question #71268

bond length in propene is shorter than bond in propane

Expert's answer

Double bond in any alkene can be described in terms of overlapping atomic orbitals.
A carbon-carbon single bond (in propane) consists of a single sigma-bond.
A carbon-carbon double bond (in propene) consists of one sigma-bond and one pi-bond. This double bond is stronger than a single covalent bond and therefore shorter.

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