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

Coleman, KS; Green, MLH; Pascu, SI; Rees, NH; Cowley, AR; Rees, LH

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 [Pd-2(mu -Br)(2)(L-)(2)], (6), where L- is [Ph2PCH=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.

Citation

Coleman, K., Green, M., Pascu, S., Rees, N., Cowley, A., & Rees, L. (online). Palladium(II) complexes with the bidentate iminophosphine ligand[Ph2PCH2C(Ph)=N(2,6-Me2C6H3)]. Journal of the Chemical Society. Dalton transactions (2001. Online), 3384-3395. https://doi.org/10.1039/b102476k

• Journal Article Type: Article
• Journal: Dalton transactions.
• Print ISSN: 1472-7773
• Electronic ISSN: 1364-5447
• Publisher: Royal Society of Chemistry
• Peer Reviewed: Peer Reviewed
• Issue: 22
• Pages: 3384-3395
• DOI: https://doi.org/10.1039/b102476k
• Keywords: X-RAY STRUCTURE; CARBON-MONOXIDE; ETHYLENE HOMOPOLYMERIZATION; NLIGANDS; COPOLYMERIZATION; CATALYSTS; PLATINUM(II); REACTIVITY;INSERTION; RUTHENIUM
• Public URL: https://durham-repository.worktribe.com/output/1585468