The crystal and molecular structure of trans-PtI(CMeNC 6H 4Cl)-(PEt 3) 2: A compound derived from the insertion of an isocyanide into a metalcarbon bond

Abstract

The title compound, obtained from the reaction of the platinum alkyl compound, PtI(Me)(PEt 3) 2, and p-chlorophenyl isocyanide, crystallizes in the monoclinic space group P2 1 / c with four molecules per unit cell with dimensions a 20.903(3), b 8.531(1), c 15.176(2)Å and β = 107.76(1)°. Its crystal and molecular structure was determined, and refined by full-matrix isotropic-anisotropic least squares on 1791 independent counter data, to a final unweighted R factor of 3.8%. The structure of this species consists of discrete molecular units, in which the platinum atom assumes its expected four-coordinate square planar geometry with PtP distances of 2.314(3) and 2.321(3)Å, a PtI distance of 2.712(1)Å, and a PtC distance of 2.027(11)Å. The intramolecular PtN distance, the distance between the nitrogen of the acylimino-group and the metal atom, is found to be 3.042(10)Å. This is clearly a non-bonding distance, refuting an earlier suggestion based on PMR data that the metal atom achieves pseudo five-coordination in these species through coordination to this atom. No unusual intermolecular distances are observed in this structure, with the closest PtPt distance being 8.531 Å.