ζ-Hexachlorocyclohexane is proved to be a 1,1,2,4,4,5-hexachlorocyclohexane by synthesis from 1,1,4,4-tetrachlorocyclohexane. The latter has been prepared from cyclohexane-dione-l,4, 1,1,4,4-tetracetoxycyclohexane and 1,4-dichloro-l, 4-diacetoxy-cyclohexane....