Schäffer Susan J Cline, Berg Rolf W
Acta Crystallogr Sect E Struct Rep Online. 2008 Oct 15;64(Pt 11):i73. doi: 10.1107/S1600536808030328.
Single crystals of the title compound, {Na(4)[Mo(VI)O(2)(SO(4))(3)]}(n), were grown from a melt of MoO(3) and Na(2)SO(4) in Na(2)S(2)O(7). In contrast to the structure of the isoformular K compound, K(4)[Mo(VI)O(2)(SO(4))(3)], with its monomeric anion, this sodium analogue contains a polymeric anion of the type {Mo(VI)O(2)(SO(4))(2)-μ-(SO(4))}(n). The Mo(VI) cations, surrounded by two tightly bonded O atoms and four O atoms of one bridging and two terminal sulfato ligands, form zigzag chains parallel to [100]. All four Na(+) cations are situated between the anionic chains and have distorted octa-hedral coordination spheres.
标题化合物{Na₄[Mo(VI)O₂(SO₄)₃]}ₙ的单晶是在Na₂S₂O₇中由MoO₃和Na₂SO₄的熔体生长而成。与其等化学式的K化合物K₄[Mo(VI)O₂(SO₄)₃]的结构不同,后者具有单体阴离子,而这种钠类似物包含一种{Mo(VI)O₂(SO₄)₂-μ-(SO₄)}ₙ型的聚合阴离子。Mo(VI)阳离子被两个紧密键合的O原子以及一个桥连硫酸根配体和两个端基硫酸根配体的四个O原子所包围,形成平行于[100]的锯齿链。所有四个Na⁺阳离子位于阴离子链之间,且具有扭曲的八面体配位球。