title: A study of [Co2(alkyne)(binap)(CO)4] complexes (BINAP=(1,1'-binaphthalene)-2,2'-diylbis(diphenylphosphine)).
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.
authors.affiliation: Department of Chemistry, Imperial College London, South Kensington, London SW7 2 AY, UK. s.gibson@imperial.ac.uk
authors.forename: Susan E
authors.initials: SE
authors.lastname: Gibson
authors.forename: Karina A C
authors.initials: KA
authors.lastname: Kaufmann
authors.forename: Jennifer A
authors.initials: JA
authors.lastname: Loch
authors.forename: Jonathan W
authors.initials: JW
authors.lastname: Steed
authors.forename: Andrew J P
authors.initials: AJ
authors.lastname: White
mesh_terms: D000171:Acrolein / Q000031:analogs & derivatives / Q000737:chemistry; D000480:Alkynes / Q000737:chemistry*; D002384:Catalysis; D003035:Cobalt / Q000737:chemistry; D007536:Isomerism; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D009281:Naphthalenes / Q000737:chemistry*; D009942:Organometallic Compounds / Q000737:chemistry*; D012238:Rhodium / Q000737:chemistry
chemical_list: D000480:Alkynes; C406943:BINAP, 2-naphthol; D009281:Naphthalenes; D009942:Organometallic Compounds; D003035:Cobalt; D000171:Acrolein; D012238:Rhodium; C012843:cinnamaldehyde