Lee See Mun, Lo Kong Mun, Ng Seik Weng
Department of Chemistry, University of Malaya, 50603 Kuala Lumpur, Malaysia.
Acta Crystallogr Sect E Struct Rep Online. 2009 Aug 19;65(Pt 9):m1103-4. doi: 10.1107/S1600536809032255.
In the title tetra-nuclear tin(IV) complex, [Sn(4)(CH(3))(8)(C(20)H(22)N(2)O(4))Cl(2)O(2)], there are three completely different tin-atom coordinations. One metal atom (site symmetry 2) adopts a distorted penta-gonal-bipyramidal SnC(2)N(2)O(3) coordination arising from the N,N',O,O'-tetra-dentate deprotonated Schiff base, two methyl groups in the axial sites and a μ(3)-O atom that also bonds to two further Sn atoms. Two symmetry-equivalent Sn atoms adopt very distorted SnC(2)O(4) arrangements that could be described as penta-gonal-bipyramidal with one equatorial vertex missing and the C atoms in the axial site. The final Sn atom (site symmetry 2) adopts an SnC(2)Cl(2)O trigonal-bipyramidal arrangement, with Cl atoms in the axial sites. As well as the two Sn atoms, one O atom lies on a twofold rotation rotation axis, and another is disordered about the axis. The terminal eth-oxy group is disordered over two sets of sites with equal occupancy.
在标题四核锡（IV）配合物[Sn₄(CH₃)₈(C₂₀H₂₂N₂O₄)Cl₂O₂]中，存在三种完全不同的锡原子配位情况。一个金属原子（位点对称性2）采用扭曲的五角双锥SnC₂N₂O₃配位，它由N,N',O,O'-四齿去质子化席夫碱、轴向位置的两个甲基以及一个也与另外两个锡原子键合的μ₃ - O原子形成。两个对称等效的锡原子采用非常扭曲的SnC₂O₄排列，可描述为缺少一个赤道顶点且轴向位置为C原子的五角双锥。最后一个锡原子（位点对称性2）采用SnC₂Cl₂O三角双锥排列，轴向位置为Cl原子。除了两个锡原子外，一个O原子位于二重旋转轴上，另一个围绕该轴无序分布。末端乙氧基在两组占有率相等的位点上无序分布。
