The aldol self-condensation of 3-phenyl-2-propenal (also known as cinnamaldehyde) would result in the formation of an enone product. Here is the reaction:
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H+
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H-C=C-CH=CH-CHO + H-C=C-CH=CH-CHO
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CHO CHO
The product of this reaction would be 3-phenyl-2-cyclohexen-1-one, which is an enone compound. The reaction involves the formation of an aldol intermediate, which undergoes dehydration to form the enone product.
The structure of the enone product is shown below:
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H
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H-C=C-C(=O)-C=C-C6H5
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Ph
The double bond between the C-2 and C-3 carbons has been converted into a carbonyl group (C=O) and a C=C double bond, resulting in the formation of the enone.