1,5-Hexadiene is the organic compound with the formula (CH)(CH=CH). It is a colorless, volatile liquid. It is used as a crosslinking agent and precursor to a variety of other compounds.

Synthesis 1,5-Hexadiene is produced commercially by the ethenolysis of 1,5-cyclooctadiene: (CHCH=CHCH) + 2 CH=CH → 2 (CH)CH=CH The catalyst is derived from ReO on alumina.

A laboratory-scale preparation involves reductive coupling of allyl chloride using magnesium:

References