Several first-row transition metals were reacted with di-2-pyridyl ketone oxime (dpko) at a 1:1 stoichiometric ratio at both a neutral pH and a pH <2. Novel complex formation with both bromide and chloride ligands were observed and rates of formation were monitored and determined by electronic spectroscopy. Novel complexes incorporating Cu2+ and Ni2+ metal centers reacted nearly instantaneously regardless of coordinating halide, although copper complexes were formed only at acidic pH. Complexes of Co2+ with dpko exhibited slower rates of reaction. Here we present the results of our kinetic studies, along with characterization and proposed mechanisms of formation of the novel complexes.

Kinetics of formation of transition-metal halide complexes of di-2-pyridyl ketone oxime

245th National Meeting (2013)

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