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Author: Peppel, Tim × End date: 2019 × Start date: 2010 × Type: Text × Publisher: Chester : IUCr × WGL Institute: LIKAT ×

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    3,3′-Dimethyl-1,1′-methyl­enediimidazolium tetra­bromido­cobaltate(II)
    (Chester : IUCr, 2018) Peppel, Tim; Spannenberg, Anke
    The title compound, (C9H14N4)[CoBr4], was obtained as single crystals directly in very low yield as a side product in the reaction of 1,1′-bis­(1-methyl­imidazolium)acetate bromide and CoBr2. The title compound consists of an imidazolium-based dication and a tetra­bromido­cobaltate(II) complex anion, which are connected via C—H...Br inter­actions in the crystal. The dihedral angle between the imidazolium rings in the cation is 72.89 (16)°. The CoII ion in the anion is coordinated tetra­hedrally by four bromide ligands [Co—Br = 2.4025 (5)–2.4091 (5) Å and Br—Co—Br = 106.224 (17)–113.893 (17)°]. The compound exhibits a high melting point (>300°C) and is a light-blue solid under ambient conditions.