The mixtures of three Pt(olefin) [P(C6H5)3]2 complexes have been determined from X-ray data collected by counter methods. The three olefinsa re ClFCCF2, Cl2CCF2, and Cl2CCCl2. All three complexes crystallize in space group C2h5P21/c with four molecules in the cell. The structures of the complexes are similar in overall detail. In each the Pt atom has trigonal coordination, if one counts the olefin as a monodentate ligand. Generally the Pt, the two P atoms, and the central C atoms of the olefin are nearly coplanar. In complex (I) there is disorder among the halogen atoms and little can be determined about the metal olefin geometry; in complex (II) there is a clear indication of rotational disorder of the CF2 group about the CC central bond. On the basis of the results for complexes (II) and (III) there is an indication that the PtC (of Cl) bond is shorter than the PtC (of F) bond, and it seems certain that the PtC (of Cl) bond is shorter than the PtC bonds in the analogous tetracyanoethylene and ethylene complexes.
ASJC Scopus subject areas
- Physical and Theoretical Chemistry
- Organic Chemistry
- Inorganic Chemistry
- Materials Chemistry