Novel monoanionic tripodal ligands: methylbis(1-methylimidazol-2-yl)(pyrazol-1-yl)borate (= [MeB(Im(N-Me))(2)(Pz(R))](-)). Synthesis and structural characterization of their nickel complexes and carboxylate shift from nickel to boron

摘要

Novel monoanionic tripodal ligands, [MeB(Im(N-Me))(2)(Pz(R))](-) (=methylbis(1-methylimidazol-2-yl)(pyrazol-1-yl)borate), are synthesized; their mode of coordination to a nickel center depends on the steric congestion around the boron centers. [References: 19]