Crystal and molecular structure of (1 -methyl-2-phenylcyclobutene-dione) bis(triphenylphosphine)platinum(0)

Abstract

Crystals of the title compound are triclinic, space group P, with a= 20.967(10), b= 12.478(6), c= 9.358(6)Å,α= 109.7(4), β= 107.1 (4). γ= 103.5(5)°, Z= 2. The structure has been refined by least-squares analysis of intensities to R 0.089 for 4 413 reflexions. The cyclobutenedione is co-ordinated via its olefinic bond. Important bond lengths are Pt-C(olefinic) 2.00(2) and 2.1 Z(2). and Pt–P 2.271(4) and 2.309(4)Å. The geometry of the co-ordinated cyclobutenedione is discussed and the distorted co-ordination geometry attributed to steric crowding in the molecule.