A simple spectrophotometric determination of some chlorobenzoquinones with morpholine, thiomorpholine and piperazine.

Abstract A spectrophotometric method for the determination of 2,5-dichloro-, 2,6-dichloro- and 2,3,5,6-tetrachloro-1,4-benzoquinones is based on the yellow products of their reaction with morpholine, thiomorpholine and piperazine in chloroform.