1. Basic Metals, Part 15. This work was supported by the Deutsche For-schungsgemeinschaft, the Fonds der Chemischen Industries, and by donations of Chemicals from Bayer AG, Leverkusen, and Degussa, Hanau. We thank B. Klingert for experimental assistance.?part 14: J. Organomet. Chem., in press.
2. Hydride derivatives of niobocene and tantalocene
3. Ber., in press.