title: Carbene or zwitterion? Competition in organoplatinum complexes.
abstract: The reaction of a known dimeric dicarbene complex of platinum with a number of ligands results in four new platinum complexes. The structure of the new complexes is described: one complex must exist as a neutral complex with no charge separation, and the other three are assigned a charge-separated (zwitterionic) structure, rather than a carbene form, on the basis of comparative 13C NMR shifts.
authors.affiliation: Department of Chemistry, University of Warwick, Coventry, UKCV4 7AL.
authors.forename: Christopher P
authors.initials: CP
authors.lastname: Newman
authors.forename: Guy J
authors.initials: GJ
authors.lastname: Clarkson
authors.forename: Nathaniel W
authors.initials: NW
authors.lastname: Alcock
authors.forename: Jonathan P
authors.initials: JP
authors.lastname: Rourke