Kinetics of the hydrolysis of some dihalogenotin(IV)β-diketonates

Abstract

The kinetics of the hydrolysis of the compounds [SnX₂(acac)₂](X = Cl, Br or I; acacH = acetylacetone) and [SnCl₂(ke)₂](keH = benzoylacetone, dibenzoylmethane, or trifluoromethylacetylacetone) are reported. The reactions all follow second-order kinetics and have negative entropies of activation. For the [SnX₂(acac)₂] compounds the enthalpies of activation decrease in the order Cl > Br > I and those for the compounds [SnX₂(ke)₂] are in the order benzoylacetone ∼ dibenzoylmethane > trifluoromethylacetylacetone. The mechanism of the reaction is discussed.