Synthesis and characterisation of the platinum complexes [PtCl(CCl=PAr)(PPh3)2] and [PtCl(CCl=PAr′)(PPh 3)2] as potential intermediates in the preparation of phosphaalkynes

Oxidative addition reactions of Cl2CPR (R = 2,4,6- tris(trifluoromethyl)phenyl (Ar) or 2,6-bis(trifluoromethyl)phenyl (Ar′) with Pt(PPh3)4 yield the cis and trans (at platinum) complexes [PtCl(ClCPAr)(PPh3)2] and [PtCl(ClCPAr′) (PPh3)2]. All starting materials and intermediates have been characterised by NMR spectroscopy. The crystal and molecular structures of the trans-platinum complexes have been determined by single-crystal X-ray diffraction at low temperature. © 2005 Elsevier B.V. All rights reserved.