5-(2,6,6-Trimethyl-2-cyclohexen-1-yl)-3-[2-(2, 6,6-trimethyl-2 -cycloh
exen-1-yl)vinyl]-2-cyclohexen-1-one, C26H38O, is a disubstituted 2-cyc
lohexenone. The cyclo-hexene ring of the 2,6,6-trimethyl-2-cyclohexen-
1-ylvinyl substituent is disordered. There are two conformations with
equal occupancies of the sites.