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Six N‐alkylpyridinium salts [CnPy]2[MCl4] (n = 4 or 12 and M = Co, Cu, Zn) were synthesized, and their structure and thermal properties were studied. The [C4Py]2[MCl4] compounds are monoclinic and crystallize in the space group P21/n. The crystals of the longer chain analogues [C12Py]2[MCl4] are triclinic and crystallize in the space group P1. Above the melting temperature, all compounds are ionic...
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