Palladium(II) complexes with the bidentate iminophosphine ligand [Ph2PCH2C(Ph)N(2,6-Me2C6H3)]

Karl S. Coleman; Malcolm L. H. Green; Sofia I. Pascu; Nicholas H. Rees; A. R. Cowley; Leigh H. Rees

doi:10.1039/B102476K

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Palladium(ii) complexes with the bidentate iminophosphine ligand [Ph₂PCH₂C(Ph)N(2,6-Me₂C₆H₃)]

Karl S. Coleman,^a Malcolm L. H. Green,*^a Sofia I. Pascu,^a Nicholas H. Rees,^a A. R. Cowley^a and Leigh H. Rees^a

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^a Inorganic Chemistry Laboratory, University of Oxford, South Parks Road, Oxford, UK

Abstract

A new iminophosphine ligand, [Ph₂PCH₂C(Ph) [double bond, length as m-dash] N(2,6-Me₂C₆H₃)] (HL), and the complexes [PdX₂(HL)], where X = Cl (1) and Br (2), [PdMeX(HL)], X = Cl (3) and Br (4), and [PdMe₂(HL)] (5) have been prepared and characterised. Reaction of 2 with MeLi or KH leads to deprotonation of the neutral ligand to give [Pd₂(μ-Br)₂(L⁻)₂], (6), where L⁻ is [Ph₂PCH [double bond, length as m-dash] C(Ph)N(2,6-Me₂C₆H₃)]⁻. Similarly, reaction of 3 with KH and triphenylphosphine affords the neutral complex [PdMe(PPh₃)(L⁻)] (7). Insertion of CO into the Pd–Me bond has been investigated, as well as the catalytic properties of [PdClMe(HL)] towards CO/ethylene copolymerisation. The crystal structures of HL, 1–3 and 5–7 have been determined.

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Supplementary files

Crystal structure data TXT (141K)

Article information

DOI: https://doi.org/10.1039/B102476K
Article type: Paper
Submitted: 16 Mar 2001
Accepted: 18 Sep 2001
First published: 01 Nov 2001

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J. Chem. Soc., Dalton Trans., 2001, 3384-3395

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Palladium(II) complexes with the bidentate iminophosphine ligand [Ph₂PCH₂C(Ph)N(2,6-Me₂C₆H₃)]

K. S. Coleman, M. L. H. Green, S. I. Pascu, N. H. Rees, A. R. Cowley and L. H. Rees, J. Chem. Soc., Dalton Trans., 2001, 3384 DOI: 10.1039/B102476K

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Journal of the Chemical Society, Dalton Transactions