Complexes of organoaluminium compounds with nitriles structure and heat of complex formation

Abstract

The heats of complexing reactions of organoaluminium compounds of type R n AlX 3− n (R = CH 3, C 2H 5; X = Cl, Br, I; n = 0, 1, 2) with benzonitrile have been measured. The heats of complex formation were calculated and a relationship between the heat and the Δν(CN) band shift is given. As with Δν(CN), the heat of complex formation may be a measure of the relative acid strength of organoaluminium compounds. The structure of the resulting complexes has been discussed in terms of the heat of complexing reaction data measured at various reactant mole ratios.