Decarboxylation syntheses of transition metal organometallics V. Preparations and structures of 2-carboxylato-3,4,5,6-tetrafluorophenyl(O,C)platinum(II) complexes

Article abstract of DOI:10.1016/S0022-328X(00)99799-7

The complexes Pt<*>O>(PPh₃)L (L = py, 2,4-Me2C5H3N or 2,6-Me2C5H3N) and Pt<*>O>L2 have been prepared by decarboxylation ractions between cis-PtCl2(PPh3)2 or PtCl2L2 and thallium(I) tetrafluorophtalate in boiling pyridine, or 2,4- or 2,6-dimethylpyridine.Reaction of cis-PtCl2(PPh3)2 with o-C6F4(CO2Tl)2 in pyridine at room temperature gives Pt(PPh3)2, which undergoes decarboxylation at 160-165 deg C in the absence of a solvent to give Pt<*>O>(PPh3)2. 31P NMR data suggest that in Pt<*>O>(PPh3)L complexes, triphenylphosphine is trans to the coordinated oxygen.The crystal structure for L = 2,6-Me2C5H3N as a chloroform solvate shows a,b,c,d-Pt(O,C,P,N) square planar stereochemistry with 2,6-dimethylpyridine near perpendicular to the coordination plane and the tetrafluorophenyl ring near coplanar with this plane.