Abstract

Double complexes [Ln(DMSO)₈][Cr(NCS)₆], where Ln = Nd (1), Eu (2), Gd (3), Dy(4), Ho (5), Lu (6), Tb (7), or Yb (8), synthesized by the reaction between aqueous solutions of Ln(NO₃)₃ and K₃[Cr(NCS)₆] and dimethyl sulfoxide C₂H₆SO (DMSO) have been studied by IR spectroscopy and single-crystal X-ray diffraction. Single crystals of compounds for XRD were obtained by isothermal recrystallization of complex powders from DMSO solutions. Compounds 1–8 are isostructural, crystallize in the triclinic system, space group P\(\overline 1 \). The crystal structure is island with [Ln(DMSO)₈]³⁺ cations and [Cr(NCS)₆]^3– anions. The asymmetric unit comprises two cations and two anions. The coordination environment of the Ln atom consists of eight O atoms of DMSO molecules located at the vertices of a distorted square antiprism. In isolated [Cr(NCS)₆]^3– anions, the chromium(III) coordination polyhedron is close to a regular octahedron and consists of N atoms of six NCS ions. The center packing of complex cations and anions is a distorted NaCl structure.

中文翻译：

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镧系元素（III）六（硫氰酸根）铬酸盐（III）与二甲基亚砜的配合物：合成和晶体结构

摘要

双配合物 [Ln(DMSO) ₈ ][Cr(NCS) ₆ ]，其中 Ln = Nd ( 1 )、Eu ( 2 )、Gd ( 3 )、Dy( 4 )、Ho ( 5 )、Lu ( 6 )， Tb ( 7 ) 或 Yb ( 8 )，由 Ln(NO ₃ ) ₃和 K ₃ [Cr(NCS) ₆ ]的水溶液与二甲基亚砜 C ₂ H _{6反应合成}已经通过红外光谱和单晶 X 射线衍射研究了 SO (DMSO)。用于 XRD 的化合物的单晶是通过从 DMSO 溶液中对复杂粉末进行等温重结晶获得的。化合物1-8是同构的，在三斜晶系中结晶，空间群P \(\overline 1 \)。晶体结构为岛状，含有[Ln(DMSO) ₈ ] ³⁺阳离子和[Cr(NCS) ₆ ] ^3–阴离子。不对称单元包含两个阳离子和两个阴离子。Ln 原子的配位环境由 DMSO 分子的 8 个 O 原子组成，它们位于扭曲的方形反棱镜的顶点。在隔离 [Cr(NCS) ₆ ]^3-阴离子，铬（III）配位多面体接近正八面体，由六个NCS离子的N原子组成。复杂的阳离子和阴离子的中心堆积是扭曲的 NaCl 结构。