The infrared spectra (4,000-50 cm-1) of complexes of 2,2'-bipyridine, 1,10-phenanthroline and their perdeuterated analogues with metal(II) perchlorates of the first transition series

A full infrared assignment (4,000 to 50 cm-1) for [M(bipy)3](ClO3)2 and [M(phen)3](ClO4)2 (M = Mn, Fe, Co, Ni, Cu, Zn; bipy = 2,2'-bipyridine, phen = 1,10-phenanthroline) and their fully deuterated analogues is presented. Several ligand bands show metal sensitivity in both series of complexes, but less so with phen. In the Jahn-Teller distorted [Cu(phen)3](ClO4)2 complex only three ligand bands show splitting, accounting for earlier postulations of the absence of J-T distortion based on spectroscopic evidence. Vibrations previously ascribed to activated ligand bands are identified as M-N bends, as combination bands, or are more fully characterized