title: Platinacycloalkane complexes containing [P,N] bidentate ligands: synthesis and decomposition studies.
abstract: A new series of platinacyclopentanes (2a-2f) and platinacycloheptanes (3a-3f) of the type [Pt(N^P)(CH2)n] (n = 4, 6) were obtained by the reaction of [Pt(COD)(CH2)n] with the appropriate iminophosphine ligand (1a-1f). These complexes were characterised using a variety of spectroscopic and analytical techniques. X-ray structure analysis of complex 2a revealed a slightly distorted square planar geometry around platinum as a consequence of the ring strain imposed by the [P,N] chelate ring formed and the metallocycloalkane. Thermal decomposition analyses of the platinacycloalkanes revealed that the platinacyclopentanes are markedly stable, with the decomposition reaction requiring temperatures higher than 100 °C to occur. The major products obtained from the thermal decomposition reactions were 1-butene (for platinacyclopentanes) and 1-hexene (for platinacycloheptanes).
authors.affiliation: Department of Chemistry, University of Cape Town, Private Bag, Rondebosch 7701, South Africa. Gregory.Smith@uct.ac.za.
authors.forename: Tebello
authors.initials: T
authors.lastname: Mahamo
authors.forename: John R
authors.initials: JR
authors.lastname: Moss
authors.forename: Selwyn F
authors.initials: SF
authors.lastname: Mapolie
authors.forename: Gregory S
authors.initials: GS
authors.lastname: Smith
authors.forename: J Chris
authors.initials: JC
authors.lastname: Slootweg
authors.forename: Koop
authors.initials: K
authors.lastname: Lammertsma