Synthese und Kristallstruktur von Bis(1,2‐dimethyl‐5‐nitro‐imidazol)dichlorocobalt(II)

Synthesis and Crystal Structure of Bis(1,2‐dimetyl‐5‐nitro‐imidazole)dichlorocobalt(II) Bis(1,2‐dimethyl‐5‐nitro‐imidazol)dichlorocobalt(II) was obtained by reaction of CoCl2 · 6 H2O with 1,2‐dimethyl‐5‐nitro‐imidazole in methanol. The compound forms blue crystals which were characterized by IR and UV‐vis spectroscopy and by an X‐ray crystal structure determination. Co(C5H7N3O2)2Cl2: tetragonal, space group I42d, Z = 8, a = 1142.1(1) pm, c = 2577.3(2) pm. R = 0.036 for 670 independent reflexions. The Co atom is tetrahedrally surrounded by two chlorine and two N atoms at distances of 222.8(2) and 203.5(4) pm.