Linear semibridging carbonyls. 2. Heterobimetallic complexes containing a coordinatively unsaturated late transition metal center Academic Article uri icon


  • The electronic structure and bonding of four heterobimetallic carbonyl complexes, (tmed)CuCo(CO)4, (PPh3)2CuMo(CO)3(η5-C5H5), (PPh3)2MoRh(CO)3(η5-C5H5), and (tmed)CuMo(CO)3(η5-C5H5), are analyzed by the parameter-free Fenske-Hall molecular orbital method. The distinguishing characteristics of these four complexes are that one of the metal centers is a coordinatively unsaturated late transition metal center and that one or more carbonyls linearly semibridge the metal-metal bond. Coordinatively unsaturated late transition metal centers have been thought to accept electron density from semibridging carbonyl ligands to satisfy the 18-electron rule. Our results, however, suggest that these centers donate electron density from a high energy occupied metal dπ orbital to the unoccupied π* orbitals of the linear semibridging carbonyl ligands. © 1989, American Chemical Society. All rights reserved.

published proceedings

  • Journal of the American Chemical Society

altmetric score

  • 3

author list (cited authors)

  • Sargent, A. L., & Hall, M. B

citation count

  • 30

complete list of authors

  • Sargent, Andrew L||Hall, Michael B

publication date

  • March 1989