Abstract

A. M. A Hassaan* and A.K. Abu Al-Nasr

The addition reactions of imidazole, N-methyl imidazole and 2-methylimidazole as Lewis bases in benzene solution with some bis- (S-methyl-N-arylidenehydrazinecarbodithioate) nickel (II) chelates as Lewis acids have been studied spectrophotornetncally at different temperatures. Stability constants and thermodynamic parameters of the base-adduct formation have been determined and discussed on the light of the different electronic and steric effects of the substituents. It was found that stability of the formed bis-adducts increases as the electron withdrawing strength of the in-plane ligand substituents increases.

Imidazoles; Reaction; Reactions; 2-methylimidazole

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