The complexes, Cp2M(μ-H)2BC4H8} (1: M=Ti; 2: M=Nb), Cp2M(μ-H)2BC5H10} (3: M=Ti; 4: M=Nb), and Cp2M(μ-H)2BC8H14} (5: M=Ti; 6: M=Nb), were prepared from the reactions of Cp2MCl2 with the organohydroborate salts, K[H2B2(μ-H)(μ-C4H8)2], K[H2BC5H10], and K[H2BC8H14], respectively. In these reactions, the transition metal is reduced from M(IV) to M(III), producing 17-electron, paramagnetic titanocene
络合物Cp 2 M (μ-H)2 BC 4 H 8 }(1:M = Ti; 2:M = Nb),Cp 2 M (μ-H)2 BC 5 H 10 }(3: M = Ti;4:M = Nb),由Cp 2 MCl的反应制备Cp 2 M (μ-H)2 BC 8 H 14 }(5:M = Ti;6:M = Nb)。2与organohydroborate盐,K [H 2乙2(μ-H)(μ-C 4 H ^ 8)2 ],K [H 2 BC 5 H 10 ]和K [H 2 BC 8 H 14 ]。在这些反应中,过渡
金属是从M(IV)至M(III)还原,从而产生17-电子,顺二茂
钛络合物(1,3和5)和18电子,反磁性niobocene复合物(2,4和6)。确定了1 – 6的单晶X射线结构。Cp 2 Nb (μ-H)2 BH 2 }(7的分子结构)是使用现代CCD技术重新确定的。