New cationic palladium (II) and rhodium (I) complexes of Ph2PCH2C(Ph)=N(2,6-Me2C6H3)

Reference:

Pascu, S. I., Coleman, K. S., Cowley, A. R., Green, M. L. H. and Rees, N. H., 2005. New cationic palladium (II) and rhodium (I) complexes of Ph2PCH2C(Ph)=N(2,6-Me2C6H3). Journal of Organometallic Chemistry, 690 (6), pp. 1645-1658.

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Official URL:

http://dx.doi.org/10.1016/j.jorganchem.2005.01.016

Abstract

Treatment of the bulky iminophosphine ligand [Ph2PCH2C(Ph)=N(2,6-Me2C6H3)] (L) with [M(CH3CN)(2)(ligand)](+n), where for M = Pd(II): ligand = eta(3)-allyl, n = 1, and for M = Rh(I), ligand: 2(C2H4), 2(CO) or cod, n = 0, yields the mono-cationic iminophosphine complexes [Pd(eta(3)-C3H5)(L)][BF4] (1), [Rh(cod)(L)][BF4](2), [Rh(CO)(CH3CN)(L)][BF4](3), and ciY-[Rh(L)(2)][BF4](4). All the new complexes have been characterised by NMR spectroscopy and X-ray diffraction. Complex I shows moderate activity in the copolymerisation of CO and ethene but is inactive towards Heck coupling of 4-bromoacetophenone and n-butyl acrylate.

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