What are the E and Z isomers of cinnamic acid?

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Answer 1 · 2016-03-20T00:58:37

See below.

Cinnamic acid is 3-phenylpropenoic acid.

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Each alkene carbon has two different groups, so the molecule can exist as #E//Z# isomers.

(#E#)-Cinnamic acid has the phenyl and #"COOH"# groups on opposite sides of the double bond.

E-Cinnamic

In (#Z#)-cinnamic acid, the phenyl and #"COOH"# groups are on the same side of the double bond.

Z-Cinnamic