Wang Tao, Zhao Jian-Ping, Bai Sheng-Di
Institute of Applied Chemistry, Shanxi University, Taiyuan 030006, People's Republic of China.
Acta Crystallogr Sect E Struct Rep Online. 2013 Nov 13;69(Pt 12):m654. doi: 10.1107/S1600536813030328.
The symmetric title mol-ecule, [Hf(C26H40N4Si)Cl4], lies about a twofold rotation axis. The Hf(IV) and Si atoms lie on the rotation axis with all other atoms being in general positions. The Hf(IV) atom is six-coordinated by two N atoms from the N (2),N (2')-(di-methyl-silanedi-yl)bis-(N-tert-butyl-3-methyl-benz-imid-amidate) ligand and four Cl(-) ions in a slightly distorted octa-hedral geometry. The two amidinate moieties are connected through the central Si atom with Si-N bond length of 1.762 (3) Å, generating the characteristic N-C-N-Si-N-C-N skeleton of a silyl-linked ansa-bis-(amidine) species.
对称的分子[Hf(C₂₆H₄₀N₄Si)Cl₄]位于一个二重旋转轴上。Hf(IV)和Si原子位于旋转轴上，所有其他原子处于一般位置。Hf(IV)原子由来自N(2),N(2')-(二甲基硅烷二亚基)双(N-叔丁基-3-甲基苯并脒酸酯)配体的两个N原子和四个Cl⁻离子以略微扭曲的八面体几何构型六配位。两个脒基部分通过中心Si原子相连，Si-N键长为1.762(3)Å，形成了硅基连接的ansa-双(脒)物种的特征性N-C-N-Si-N-C-N骨架。
