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Palladium complexes of 2-pyridin-2-yl substituted 1,3-bis(diphenylphosphino)propane: Highly active catalysts for the room-temperature copolymerization of carbon monoxide with ethene

Lookup NU author(s): Dr Simon Doherty, Dr Edward Robins, Paul Anthony Champkin, Emeritus Professor Bill Clegg

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Abstract

The 2,2′-disubstituted 1,3-bis(diphenylphosphino)propane derivatives [XC (Me)(CH2PPh2)2] (X = 2-py, 1a; X = CH2OMe, 1b; X = Ph, 1c) and their corresponding palladium complexes [(P-P)PdCl2] (2a-c), [(P-P)Pd(OAc)2] (3a-c), [{2-methyl-2-pyridin-2-yl-1,3-bis(diphenylphosphino)propane}PdClMe] (4a), and [{(S)-(+)-N,N-dimethyl-α-methylbenzylamine-C,N}-Pd{2-MeOCH2CMe( CH2PPh2)2}][ClO4] (5b) have been prepared and characterized. Palladium(II) complexes of 2-methyl-2-pyridin-2-yl-1,3-bis(diphenylphosphino)propane (la) are highly active for the room-temperature copolymerization of ethene and carbon monoxide and, under our conditions, markedly more active than systems based on 1,3-bis(diphenylphosphino)propane (dppp), 1b and 1c. Catalysts formed from dppp, 1b, and lc all show the expected increase in activity at elevated temperature (90 °C), while that formed from la is highly temperature-sensitive and rapidly decomposes.


Publication metadata

Author(s): Champkin PA; Doherty S; Robins EG; Clegg W; Nieuwenhuyzen M

Publication type: Article

Publication status: Published

Journal: Organometallics

Year: 2002

Volume: 21

Issue: 20

Pages: 4147-4158

ISSN (print): 0276-7333

ISSN (electronic):

Publisher: American Chemical Society

URL: http://dx.doi.org/10.1021/om020301c

DOI: 10.1021/om020301c


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