Organometallics 1992, 11, 127-138 (Grant CHE-8819760) and for the purchase of the Nicolet R3m diffractometer and computing system. K.P. is also grateful to the Deutsche Forschungsgemeinschaft for financial assistance. We also thank E. K. Barefield for helpful discussions. Registry No. 7,137365-76-5;8,137365-77-6;9,137393-39-6; 11,137365787;CF3C02H,76-051; Cp,ZrMe(0,CCF3),99494-55-0;
127
tBuNC, 7188-38-7; Cp,Zr(Me)H, 67659-92-1. Available: Lists of complete bond
lengths and anisotropic thermal parameters,and H coordinatesfor 8 and lists of completebond length and angles and anisotropic and isotropic thermal Darameters for 9 (26 Danes): . tables o i structure fa
