Synthesis, crystal structure and thermal properties of catena-poly[[[bis-(2,3-di-methyl-pyrazine-κN ¹)cadmium(II)]-di-μ-chlorido] monohydrate].

IF 0.5 Q4 CRYSTALLOGRAPHY

Acta Crystallographica Section E: Crystallographic Communications Pub Date : 2026-09-30 eCollection Date: 2026-10-01 DOI:10.1107/S2056989026009941

Christian Näther

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引用次数: 0

Abstract

The title compound, {[CdCl₂(C₆H₈N₂)₂]·H₂O} _n (C₆H₈N₂ = 2,3-di-methyl-pyrazine) was prepared by the reaction of cadmium chloride with 2,3-di-methyl-pyrazine in water. The asymmetric unit consists of two crystallographically independent cadmium cations that are situated on a twofold rotation axis, two crystallographically independent chloride anions and 2,3-di-methyl-pyrazine ligands as well as one water mol-ecule that are all located in general positions. The cadmium cations are octa-hedrally coordinated by two terminally N-bonded 2,3-di-methyl-pyrazine ligands and four chloride anions and are linked by pairs of μ-1,1 bridging chloride anions into chains that propagate in the crystallographic b-axis direction. These chains are connected into layers via the water mol-ecule of crystallization by inter-chain O-H⋯N hydrogen bonding. Powder X-ray diffraction (PXRD) indicates that a pure phase has been obtained. Thermogravimetry (TG) coupled to differential thermal analysis (DTA) indicates that the water mol-ecules are removed in the first step and that the 2,3-di-methyl-pyrazine ligands are lost in the subsequent two steps, leading to a compound with the composition [CdCl₂(C₆H₈N₂)].

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链链-聚[[[双-（2,3-二甲基吡嗪-κ n 1）镉（II）]-二μ-氯二]一水合物]的合成、晶体结构和热性能

用氯化镉与2,3-二甲基吡嗪在水中反应，得到标题化合物{[CdCl2(C6H8N2)2]·H2O} n （C6H8N2 = 2,3-二甲基吡嗪）。不对称单元由两个晶体独立的镉阳离子组成，它们位于双旋转轴上，两个晶体独立的氯阴离子和2,3-二甲基吡嗪配体，以及一个水分子，它们都位于一般位置。镉离子由两个末端n键的2,3-二甲基吡嗪配体和四个氯阴离子组成八面体配位，并由μ-1,1桥接氯阴离子对连接成沿晶体b轴方向传播的链。这些链通过链间O-H⋯N氢键通过结晶的水分子连接成层。粉末x射线衍射（PXRD）表明得到了纯相。热重（TG）耦合差热分析（DTA）表明，在第一步中水分子被去除，在随后的两步中2,3-二甲基吡嗪配体丢失，从而得到了组成为[CdCl2(C6H8N2)]的化合物。

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来源期刊

Acta Crystallographica Section E: Crystallographic Communications Chemistry-Chemistry (all)

CiteScore

1.90

自引率

0.00%

发文量

351

审稿时长

3 weeks

期刊介绍： Acta Crystallographica Section E: Crystallographic Communications is the IUCr''s open-access structural communications journal. It provides a fast, simple and easily accessible publication mechanism for crystal structure determinations of inorganic, metal-organic and organic compounds. The electronic submission, validation, refereeing and publication facilities of the journal ensure rapid and high-quality publication of fully validated structures. The primary article category is Research Communications; these are peer-reviewed articles describing one or more structure determinations with appropriate discussion of the science.