Abstract

Attempted kinetic studies of the acetylation of tricarbonylbenzenechromium are reported. Its is shown that the Lewis acid, aluminium trichloride, reacts directly at the chromium atom to give Cr 11(Al 2Cl 6)(CS 2) 2; consequently no theoretical conclusions on relative reactivities of free arene and π-bonded arenes can be drawn from this system. It is suggested that additional electrophilic substitution at the metal atom may occur on Friedel Crafts reactions of all metal-organic systems.

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