Crystal and molecular structure of trans-di-iodobis(tricyclohexylphosphine)platinum(II): an overcrowded molecule

Abstract

The crystal and molecular structure of the title compound has been determined. Crystals are triclinic, space group P, a= 11·139(2), b= 10·235(2), c= 10·269(2)Å, a= 90·85(2), β= 113·84(2), γ= 110·91 (2)°, Z= 1·3533 observed intensities were measured by diffractometer; the structure was solved by the heavy-atom method and refined to a final R of 0·041. The crystal contains discrete trans-[PtI₂{(C₆H₁₁)₃P}₃] molecules, which show considerable evidence of overcrowding, most apparent in the Pt–P [2·371(2)Å] and the Pt-I distances [2·612(1); expected values 2·32 and 2·60 Å]. This is correlated with the ready elimination of tricyclohexylphosphine from the title compound.