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# Stereochemistry of Alkenes: Cis- and trans- Isomerism

ORGO1-QDWY36

As opposed to the carbon-carbon double bond, introduction to the molecule a carbon-oxygen double bond never results in the formation of cis- or trans-isomers.

Why?

A

$C=O$ group is stronger than the $C=C$ bond.

B

$C=O$ group is more polar than the $C=C$ bond.

C

Oxygen is connected to only one atom,

D

Rotation around the $C=O$ bond is too difficult.