During a continuation of some investigations? on the cleavage of benzyl phenyl sulfides by aluminum bromide, it was noted that 4-bromothiophenol (I), in chlorobenzene solution containing a molar equivalent of aluminum bromide, showed a rapid disappearance of the thiol group, as determined by iodine titration. The product, which was formed in high yield, was found to be 4-chlorodiphenyl sulfide (V), and was characterized by oxidation to the ...