Crystal structure of di­aqua­bis­(2,6-di­methyl­pyrazine-κN4)bis­(thio­cyanato-κN)cobalt(II) 2,5-di­methyl­pyrazine monosolvate

Acta Crystallographica Section E: Crystallographic Communications

Jess, I.¹  Suckert, S.¹  Wö²  Nä²  hlert, S.³  ther, C.³ 

[1] Institut für Anorganische Chemie, Christian-Albrechts-Universität Kiel, Max-Eyth-Strasse 2, 24118 Kiel, Germany

关键词: CRYSTAL STRUCTURE;    COORDINATION POLYMER;    OCTAHEDRAL COORDINATION;    COBALT(II);   

DOI  :  10.1107/S2056989015021829

学科分类：数学（综合）

来源: International Union of Crystallography

【 摘 要 】

In the crystal structure of the title compound, [Co(NCS)2(C6H8N2)2(H2O)2]·C6H8N2, the CoII cation is coordinated by the N atoms of two terminal thio­cyanate anions, the O atoms of two water mol­ecules and two N atoms of two 2,6-di­methyl­pyrazine ligands. The coordination sphere of the resulting discrete complex is that of a slightly distorted octa­hedron. The asymmetric unit comprises a CoII cation and half of a 2,5-di­methyl­pyrazine ligand, both of which are located on centres of inversion, and a water ligand, a 2,6-di­­methyl­pyrazine ligand and one thio­cyanate anion in general positions. In the crystal, the discrete complexes are arranged in such a way that cavities are formed in which the 2,5-di­methyl­pyrazine solvent mol­ecules are located. The coordination of the 2,5-di­methyl­pyrazine mol­ecules to the metal is apparently hindered due to the bulky methyl groups in vicinal positions to the N atoms, leading to a preferential coordination of the 2,6-di­methyl­pyrazine ligands. The discrete complexes are linked by O—H⋯N hydrogen bonds between one water H atom and the non-coordinating N atom of the 2,6-di­methyl­pyrazine ligands. The remaining water H atom is hydrogen bonded to one N atom of the 2,5-di­methyl­pyrazine solvent mol­ecule. This arrangement leads to the formation of a two-dimensional network extending parallel to (010).

【 授权许可】

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