Structures, electrochemical and spectral properties of a series of [MnN(CN)3(diimine)]- complexes

Abstract

The structures and the electrochemical and spectral properties of a series of discrete [PPh4][MnN(CN)3(diimine)] complexes {diimine = 2,2′-bipyridine [1(bpy)], 4,4′-dimethyl-2,2′-bipyridine [1(4-dmbpy)], 5,5′-dimethyl-2,2′-bipyridine [1(5-dmbpy)], 1,10-phenanthroline [1(phen)] and bipyrimidine [1(bpym)]} have been assessed. These complexes represent potential building blocks for the construction of coordination frameworks. The incorporation of diimine ligands with different π-accepting capacities allows the systematic tuning of the metal-to-ligand charge-transfer (MLCT) band as well as the MnV/MnVI redox potential. The complexes exhibit solvatochromism, and the marked sensitivity of λmax of ..