Nakabayashi Koji, Ohkoshi Shin-Ichi
Department of Chemistry, School of Science, University of Tokyo, 7-3-1 Hongo, Bunkyo-Ku, Tokyo 113-0033, Japan.
Acta Crystallogr Sect E Struct Rep Online. 2010 Sep 25;66(Pt 10):m1300. doi: 10.1107/S1600536810028989.
In the polymeric title compound, {[Ho(2)(C(6)H(2)O(4))(3)(H(2)O)(6)]·18H(2)O}(n), the Ho(III) ion is nine-coordinated by six O atoms derived from three bidentate 2,5-dihy-droxy-1,4-benzoquinonate (DHBQ(2-)) ligands and three O atoms from three water mol-ecules. The Ho(III) ions are connected via three ligands, resulting in the formation of a two-dimensional honeycomb layer parallel to the ab plane. The layer is racemic in which Δ- and Λ-coordination geometries around Ho(III) ions are alternately arranged. The asymmetric unit comprises a third of a Ho(III) ion, located on a threefold axis, one-half of a DHBQ(2-) ion, located on a centre of inversion, one coordinated water mol-ecule and three uncoordinated water mol-ecules.
在聚合标题化合物{[Ho₂(C₆H₂O₄)₃(H₂O)₆]·18H₂O}ₙ中，Ho(III)离子由来自三个双齿2,5-二羟基-1,4-苯醌（DHBQ²⁻）配体的六个O原子和来自三个水分子的三个O原子九配位。Ho(III)离子通过三个配体相连，形成平行于ab平面的二维蜂窝状层。该层是外消旋的，其中Ho(III)离子周围的Δ和Λ配位几何结构交替排列。不对称单元包括位于三重轴上的三分之一Ho(III)离子、位于反演中心上的二分之一DHBQ²⁻离子、一个配位水分子和三个未配位水分子。
