Tags: Chemical Compound, Chemical Substance.

Phenylpropiolic acid C6H5CCCO2H formed by the action of alcoholic potash on cinnamic acid dibromide C6H5CHBrCHBrCO2H crystallizes in long needles or prisms which melt at 136–137 °C. When heated with water to 120 °C it yields phenylacetylene (C6H5CCH). Chromic acid oxidizes it to benzoic acid; zinc and acetic acid reduce it to cinnamic acid C6H5CH=CHCO2H whilst sodium amalgam reduces it to hydrocinnamic acid C6H5CH2CH2CO2H.

Phenylpropiolic_acid.png
IUPAC name
Phenylpropynoic acid

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