A study of [Co2(alkyne)(binap)(CO)4] complexes (BINAP=(1,1'-binaphthalene)-2,2'-diylbis(diphenylphosphine)).
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.
Gibson
Susan E
SE
Department of Chemistry, Imperial College London, South Kensington, London SW7 2 AY, UK. s.gibson@imperial.ac.uk
Kaufmann
Karina A C
KA
Loch
Jennifer A
JA
Steed
Jonathan W
JW
White
Andrew J P
AJ
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
D000480:Alkynes; C406943:BINAP, 2-naphthol; D009281:Naphthalenes; D009942:Organometallic Compounds; D003035:Cobalt; D000171:Acrolein; D012238:Rhodium; C012843:cinnamaldehyde