Neutron diffraction analysis of TaCp2(H)(SiMe2H)2 (1) has revealed a symmetric structure with a classical, rather than agostic, hydride ligand: the Ta–H distance is 1.785(15) Å, the non-bonding H···Si distances are 2.189(18) and 2.190(17) Å, and the H–Ta–Si angles are 55.2(5) and 55.5(5)°; final R factor = 8.9% for 1295 reflections.
References
1.
BrookhartM., and GreenM. L. H., J. Organometal. Chem., 1983, 250, 395.
2.
WilliamsJ. M., BrownR. K., SchultzA. J., StuckyG. D., and IttelS. D., J. Am. Chem. Soc., 1978, 100, 7407.
