PREPARATION AND REACTIONS OF BINUCLEAR PLATINUM(II) COMPLEXES - SINGLE-CRYSTAL X-RAY-DIFFRACTION STUDY OF A TETRAKIS(DIFLUOROPHOSPHONATO)PALLADATE(II) COMPLEX

o-Methylbenzyldifluorophosphite 2 was obtained by the reaction of o-me thylbenzyl-trimethyl silyl ether 1 with chlorodifluorophosphine PF2Cl. The reaction of 2 with the palladium(II) complex 3 led to the tetraki s(difluorophosphonato)palladate(II) complex 7. The X-ray structure ana lysis of 7 confirmed the nearly exact square planar structure at the m etal atom of the tetrakis(difluorophosphonato)palladate(II) dianion. M inimal deviations from the ideal geometry at palladium and phosphorus are mainly the result of thermal motion or disorder phenomena in the c rystal. In the reaction of the platinum(II) complex 8 with chlorodiflu orophosphine the binuclear etrakis(chlorodifluorophosphine)platinum(II )chloro complex 9 was obtained. In acetonitrile, 9 was cleaved to form the mononuclear complex 10. Similar results were obtained in the oxid ative addition reactions of the platinum(0) complex 11 with sulfuryl c hloride fluoride, 12, sulfuryl fluoride, 13, and phosphorus pentafluor ide. akis(triphenylphosphine)-mu-dichlorodiplatinum(II) hexafluorophos phate 14 was isolated. In acetonitrile the mononuclear onitrile-bis(tr iphenylphosphine)chloroplatinum(II) hexafluorophosphate complex 15 was isolated.