9-Acylanthracenes undergo reaction with cupric halides in chlorobenzene to give 9-acyl-10- halogenoanthracenes together with 9-halogeno-and 9, 10-dihalogenoanthracenes. The products arise from ligand-transfer reactions of the cupric halide and the 9-acylanthracene at the 9-and 10-positions. 9-Acetylanthracene gives 9-bromoacetylanthracene on reaction with cupric bromide in ethyl acetate-chloroform.
