The Metal Oxo [1,2]-Alkyl Shift – Towards the Aerobic Oxidation of Hydrocarbons

Authors

  • Christian Cremer Anorganisch-Chemisches Institut, Universität Zürich, Winterthurerstrasse 190, CH-8057 Zürich
  • Heiko Jacobsen Anorganisch-Chemisches Institut, Universität Zürich, Winterthurerstrasse 190, CH-8057 Zürich
  • Peter Burger Anorganisch-Chemisches Institut, Universität Zürich, Winterthurerstrasse 190, CH-8057 Zürich

DOI:

https://doi.org/10.2533/chimia.1997.650

Abstract

The syntheses and X-ray crystal structures of novel monocyclopentadienyl tungsten(IV) and molybdenum(IV) complexes with additional 4,4'-disubstituted 2,2'- bipyridine ligands are presented. The preference for the observed μ-O bridged dimeric structure in the (Cp*Mo,W(μ-O)(4,4'-R2-bipy)]22+ compounds rather than a monomeric structure with a terminal M=O unit is rationalized by Extended Hückel MO calculations. In addition, a synthetic route to C1-, C2- and Si-bridged ansa-magnesocenes is described and X-ray crystal structures of representative examples displaying an unsymmetrical cyclopentadienyl binding mode are provided. The ansa-magnesocenes are excellent starting materials for the syntheses of bridged dicyclopentadienyl ditungsten complexes with W,W multiple bonds. The X-ray crystal structure of the C1-bridged tetrakis-dimethylamide compound, Me2C[η5-C5H4)W(NMe2)2)]2, is presented.

Funding data

Downloads

Published

1997-09-30

Issue

Vol. 51 No. 8-9 (1997): Assemblée d'automne 1997 / Herbstversammlung 1997

Section

Articles

License

Copyright (c) 1997 Christian Cremer, Heiko Jacobsen, Peter Burger

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.

How to Cite

[1]
C. Cremer, H. Jacobsen, P. Burger, Chimia 1997, 51, 650, DOI: 10.2533/chimia.1997.650.