Palladium(ii) complexes with the bidentate iminophosphine ligand [Ph2PCH2C(Ph)î€N(2,6-Me2C6H3)]
- 1 November 2001
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc., Dalton Trans.
- No. 22,p. 3384-3395
- https://doi.org/10.1039/b102476k
Abstract
A new iminophosphine ligand, [Ph2PCH2C(Ph)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 [Ph2PCHC(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.Keywords
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