Wei Peihai, Yuan Dong, Zhu Wencai, Zhang Xiutang, Hu Bo
Acta Crystallogr Sect E Struct Rep Online. 2010 Jan 23;66(Pt 2):m190-1. doi: 10.1107/S1600536810002412.
The asymmetric unit of the title compound, Fe(C(8)H(7)N(3))(3)[SiMo(14)O(44)], consists of a complex Fe(C(8)H(7)N(3))(3) cation and half of a derivative of an α-Keggin-type anion, SiMo(14)O(44). In the mixed-valent Mo(V/VI) anion, the α-Keggin type core is capped on two oppositely disposed tetra-gonal faces by additional (MoO(2)) units. The SiMo(14)O(44) anion shows disorder. Two O atoms of the central SiO(4) group ( symmetry) are equally disordered about an inversion centre. Moreover, two of the outer bridging O atoms and the O atoms of the capping (MoO(2)) unit are likewise disordered. The Fe(2+) cation is surrounded in a slightly distorted octa-hedral coordination by six N atoms from three 3-(2-pyrid-yl)-1H-pyrazole ligands. N-H⋯O hydrogen bonding between the cations and anions leads to a consolidation of the structure.
标题化合物[Fe(C₈H₇N₃)₃]₂[SiMo₁₄O₄₄]的不对称单元由一个[Fe(C₈H₇N₃)₃]²⁺络合阳离子和一个α-凯氏型阴离子[SiMo₁₄O₄₄]⁴⁻衍生物的一半组成。在混合价态的Mo(V/VI)阴离子中，α-凯氏型核心在两个相对的四方面上被额外的(MoO₂)单元覆盖。[SiMo₁₄O₄₄]⁴⁻阴离子表现出无序性。中心SiO₄基团的两个O原子（对称）围绕一个反演中心同样无序。此外，两个外部桥连O原子和覆盖(MoO₂)单元的O原子同样无序。Fe²⁺阳离子被来自三个3-(2-吡啶基)-1H-吡唑配体的六个N原子以略微扭曲的八面体配位方式包围。阳离子和阴离子之间的N-H⋯O氢键导致结构的巩固。
