Crystal structure of bis­(di­methyl­ammonium) hexa­aqua­cobalt(II) bis­(sulfate) dihydrate

Acta Crystallographica Section E: Crystallographic Communications

Held, P.¹ 

[1] Institut für Kristallographie, Universität zu Köln, Greinstr. 6, D-50939 Köln, Germany

关键词: CRYSTAL STRUCTURE;    DIMETHYLAMMONIUM SALT;    HEXAAQUACOBALT(II) SALT;    SULFATE;    HYDROGEN BONDING;   

DOI  :  10.1107/S2056989015003400

学科分类：数学（综合）

来源: International Union of Crystallography

【 摘 要 】

The title salt, (C2H8N)2[Co(H2O)6)](SO4)2·2H2O, is isotypic with (C2H8N)2[Ni(H2O)6)](SO4)2·2H2O. The Co—O bond lengths in the [Co(H2O)6]2+ complex cation show very similar distances as in the related Tutton salt (NH4)2[Co(H2O)6)](SO4)2 [average 2.093 (17) Å], but are significantly longer than in the isotypic NiII compound (Δd ≃ 0.04 Å). The cobalt cation reaches an overall bond-valence sum of 1.97 valence units. The S—O distances are nearly equal, ranging from 1.454 (4) to 1.470 (3) Å [mean 1.465 (12) Å]; however, the O—S—O angles vary clearly from 108.1 (2) to 110.2 (2)° [average bond angle 109.5 (9)°]. The non-coordinating water mol­ecules and di­methyl­ammonium cations connect the sulfate tetrahedra and the [Co(H2O)6]2+ octa­hedron via O—H⋯O and N—H⋯O hydrogen bonds of weak up to medium strength into a three-dimensional framework whereby the complex metal cations and sulfate anions are arranged in sheets parallel to (001).

【 授权许可】

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