study was performed for paramagnetic compound 5. In 3, the two borohydride units are orthogonal to each other as a result of the overlap of an antiphase combination of B-H orbitals with the empty dxy orbital of Ti. In contrast, the dxy orbital of the metal atom is singly occupied in 5 and fully occupied in 6 and 7, and both borohydride ligands are oriented in the same way, with the B(μ-H2)M moieties
新型亚
氨基双(
硼氢化物)配合物 [(RN=)M(PMe3)2(η2-
BH4)2] [R = Ar, M = Ti (3); R = Ar,M = V (5);R = Ar,M = Mo (6);R = Ar', M = Mo (7); Ar = 2,6-iPr2C6H3, Ar' = 2,6-Me2C6H3] 由二
氯化物 [(RN=)MCl2(PMe3)n] (M = Ti, n = 2; M = V, n = 2, M = Mo, n = 3) 与 Li (2 当量)在 THF 中。通过IR光谱和X射线衍射研究了化合物3、5、6和7,并对顺磁性化合物5进行了EPR光谱研究。在3中,由于重叠的结果,两个
硼氢化物单元彼此正交BH 轨道与 Ti 的空 dxy 轨道的反相组合。相比之下,
金属原子的 dxy 轨道在 5 中单独占据,在 6 和 7 中完全占据,并且两个
硼氢化物配体的取向方式相同,