Relative efficiency of catalysts and the kinetic order in catalyst concentration

1 Relative efficiency of catalysts and the kinetic order in catalyst concentration 

The first significant kinetic study of acylation was that of Steele333, who measured rates of benzoylation of toluene (excess) by benzoyl chloride catalysed 

The aluminium chloride-catalysed reaction of benzene with excess benzoyl chloride gave simple second-order kinetics, viz. 

With gallium chloride, ferric chloride and antimony pentachloride the rate coefficients were dependent upon the concentration of chlorobenzene and the square of the concentration of the catalyst, but the third-order coefficients varied with the initial concentration of the catalyst (Table 103)394. The overall kinetic equation was, therefore, 

RATE COEFFICIENTS FOR REACTION OF PhCOCl (EXCESS) WITH PhH, CATALYSED BY 

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