PREPARATION AND REACTIONS OF (ETA(5)-PENTAMETHYLCYCLOPENTADIENYL)-TITANIUM AND (ETA(5)-ETHYLTETRAMETHYLCYCLOPENTADIENYL)TITANIUM TRIFLUORIDE

Compound Cp*TiCl3 (1, Cp* = eta5-Me5C5) reacts with an excess of AsF3 to yield the crystalline complex [Cp*TiF3]2 . 2 AsF3 (2). AsF3 can be removed from 2 in vacuo to give Cp*TiF3 (3). Complex (eta5-EtMe4C5)TiCl3 (4) is converted by an excess of AsF3 to (eta5-EtMe4C5)TiF3 (5). Compound 3 reacts with a lithium 1,3-diketonate to form the hexacoordinated complex Cp*TiF2(O=C(OEt)C(Ph)=C(OEt)-O) (6) and with a lithium benzamidinate to yield pentacoordinated Cp*TiF2[(Me3SiN)2C-C6H4OMe-(4)] (7): The reaction of 3 with Ph3PNSiMe3 and C2H2(Ph2PNSiMe3)2 leads to Cp*TiF2NPPh3 (8) and (Cp*Ti-F2NPPh2)2C2H2 (9), respectively. X-Ray structure analyses of compounds 2 and 5-9 have been performed.