The study of kinetics of displacement of reactive chlorine from a model compound, cinnamyl chloride, has been extended from barium/cadmium to barium/zinc and calcium/zinc carboxylate blends. With carboxylate ligands, the specificity of mixed metal complexes in yielding alkaline earth, rather than Lewis acid, chlorides is not as great with zinc as with cadmium. In the case of barium/zinc blends, this may be compensated for by complexing the metals with a ketoenolate ligand, e.g., benzoylacetone. In a mixed benzoyl‐acetone/butyl acetate solvent, barium/zinc carboxylates yielded reaction rates with cinnamyl chloride comparable to barium/cadmium blends.
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Richard F. Grossman (1990) studied this question.
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