Section III, 1922 [265] Trans. R.S.C. 



The Intermediate Compounds in the Reaction betwjeen Phthalic Anhy- 

 dride, Aluminium Chl'oride and Aromatic Hydrocarbons 



ByT. C. McMuLLEN, M.A. 



Presented by Professor F. B. Allan, F. R.S.C, 



The first intermediate compound in the reaction between phthalic 

 anhydride, benzene, and aluminium chloride when treated, in benzene 

 solution, with naphthalene gave a 35% yield of naphthoyl-benzoic 

 acids. If ether be added to the benzene solution of this first inter- 

 mediate compound a heavy oil is precipitated which gives benzoyl- 

 benzoic acid and no naphthoyl-benzoic acids when treated with 

 naphthalene. 



The second intermediate compound, which is insoluble in ben- 

 zene, when prepared from phthalic anhydride, benzene, and aluminium 

 chloride and treated with naphthalene and acetic anhydride gave an 

 80% yield of the naphthoyl-phenylphthalides most of which was 

 the /3-naphthoylphenylphthalide. Attempts to prepare these 

 phthalides from the intermediate compounds prepared from phthalic 

 anhydride, naphthalene, and aluminium chloride by adding benzene 

 and acetic anhydride were unsuccessful. Various derivatives of 

 these mixed phthalides were also prepared. 



In the course of this investigation nine new compounds were 

 prepared. 



Concentration changes at the Cathode during Electrolysis of Acid Sol- 

 utions of Copper Sulphate 



By Professor J. T. Burt-Gerrans and A. R. Gordon, B.A. 



Presented by Professor W. Lash Miller, F. R.S.C. 



In continuation of the work of Mr. L. V. Redman in this labor- 

 atory^ oscillographic measurements have been made of the interval 

 of time that elapses between closing the circuit and evolution of 

 hydrogen at the cathode during electrolysis of acid solutions of 

 copper sulphate. Special precautions were taken to ensure a uniform 



iTrans. Roy. Soc. Can., 1908, Sec. III., p. 244. 



