A study of [Co2(alkyne)(binap)(CO)4] complexes (BINAP=(1,1'-binaphthalene)-2,2'-diylbis(diphenylphosphine))

Chemistry. 2005 Apr 8;11(8):2566-76. doi: 10.1002/chem.200401210.

Abstract

Understanding the interaction of chiral ligands, alkynes, and alkenes with cobaltcarbonyl sources is critical to learning more about the mechanism of the catalytic, asymmetric Pauson-Khand reaction. We have successfully characterized complexes of the type [Co2(alkyne)(binap)(CO)4] (BINAP=(1,1'-binaphthalene)-2,2'-diylbis(diphenylphosphine)) and shown that diastereomer interconversion occurs under Pauson-Khand reaction conditions when alkyne=HC[triple bond]CCO2Me. Attempts to isolate [Co2(alkyne)(binap)(CO)x] complexes with coordinated alkenes led to the formation of cobaltacyclopentadiene species.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Acrolein / analogs & derivatives
  • Acrolein / chemistry
  • Alkynes / chemistry*
  • Catalysis
  • Cobalt / chemistry
  • Isomerism
  • Magnetic Resonance Spectroscopy
  • Molecular Structure
  • Naphthalenes / chemistry*
  • Organometallic Compounds / chemistry*
  • Rhodium / chemistry

Substances

  • Alkynes
  • BINAP, 2-naphthol
  • Naphthalenes
  • Organometallic Compounds
  • Cobalt
  • Acrolein
  • Rhodium
  • cinnamaldehyde