Syntheses and Structures of Metallocene Methyltrihydroborate Derivativies: Cp2ZrCI{(mu)-H)2BHCHs}, Cp2Zr{((mu)-H)2BHCH3}2, and Cp2Ti{(mu)-H)2BHCH3}

In reactions of zirconocene dichloride, CZrC, with 1 equiv and an excess amount of UBHsCHs, the methyltrihydroborate complexes, Cp2ZrCI{(-H)2BHCH3}, 1, and Cp2Zr{(-H)2BHCH3}2,2, were isolated. The reaction of titanocene dichloride, Cp2TiCl2, with an excess amount of LiBH3CH3 produced the monosubstituted methyltrihydroborate complex, Cp2"Ti{(-H)2BHCH3}, 3. The titanium was reduced from Ti(IV) to Ti(lll), producing a 17electron, paramagnetic titanocene complex. Under a dynamic vacuum at room temperature, compound 2 decomposed and produced the zirconium hydride compound Cp2ZrH{-H)2BHCH3}. Single crystal X-ray structures of 1, 2,...