SYNTHESIS AND STRUCTURAL CHARACTERIZATION OF SULFONATES, PHOSPHINATESAND CARBOXYLATES OF ORGANOMETALLIC GROUP-4 METAL FLUORIDES

Reaction of [Cp TiF3] (Cp* = (eta(5)-C5Me5)) with Me3SiOSO2-p-C6H4CH3 , Me3SiOPOPh2 and 1,2-(Me3SiOCO)(2)C6H4 yields the dinuclear complexes [{Cp TiF(mu-F)(mu-OSO2-p-C6H4CH3)}(2)] (1), [{Cp*TiF(mu-F)(mu-OPOPh2 )}(2)] (2) and [{Cp TiF(mu-F)(mu-OCO-o-C6H4CO2SiMe3)}(2)] (3). The mo lecular structures of 1 and 2 have been determined by single-crystal X -ray analysis. In complexes 1-3, the two titanium atoms are connected by bridging fluorine atoms as well as bridging sulfonate, phosphinate and carboxylate groups respectively. Each titanium atom is also bonded to a terminal fluorine atom. Reaction of [Cp-2 ZrF2] with 1,2-(Me3Si OCO)(2)C6H4 leads to the mononuclear pentacoordinate 18-electron speci es [Cp-2ZrF(mu-OCO-o-C6H4CO2SiMe3)] (4) and its structure was determi ned by X-ray crystallographic methods. (C) 1998 Elsevier Science S.A.