Ligand effects on the delta->delta 6* band energies and intensities in a series of diimine complexes of dimolybdenum Academic Article uri icon

abstract

  • The complexes Mo2X4(diimine)2 (X = Cl, Br, I and diimine = 2,2-bipyridine, 4,4-dimethyl-2,2-bipyridine, 2,2-bipyrazine, 3,3-bipyridazine, 2,2-bipyrimidine, 1,10-phenanthroline and 4,7-diphenyl-1,10-phenanthroline) have been prepared by reaction of Mo2 (OAc)4 with (CH3)3SiX in the presence of excess diimine. The product complexes apparently contain non-bridged quadruple molybdenum-molybdenum bonds. Each molybdenum is coordinated to a bidentate diimine and two halogen atoms. Electronic absorption and electrochemical studies have shown that shifts in the energy of the * band are affected by the mixing of this transition with a metal-to-ligand charge transfer transition, probably a * transition. It was also found that the compounds Mo2X4(diimine)2 react slowly with oxygen to form Mo2O4Cl4(diimine)2 and then MoO2Cl2(diimine). The crystal and molecular structure of MoO2Cl2 (4,4-dimethyl-2,2bipyridine), determined by a three-dimensional X-ray diffraction study, is reported. Copyright 1996 Elsevier Science Ltd.

published proceedings

  • POLYHEDRON

author list (cited authors)

  • Baird, D. M., Yang, F. L., Kavanaugh, D. J., Finness, G., & Dunbar, K. R.

citation count

  • 17

complete list of authors

  • Baird, DM||Yang, FL||Kavanaugh, DJ||Finness, G||Dunbar, KR

publication date

  • August 1996