Summary
Reaction of CoII with N(CN) sup−inf2 or C(CN) sup−inf3 in the presence of imidazole (iz) or its methyl derivatives (2-meiz and 4-meiz) gave eight compounds of CoII: ligand stoichiometry 1∶2, including two isomeric pairs (α and β) for the complexes [Co{C(CN)3}2(2-meiz)2] and [Co{C(CN)3}2-(4-meiz)2]. The complexes were studied by electronic and i.r. spectroscopies. For α-[Co{C(CN)3}2(2-meiz)2] singlecrystal X-ray analysis was performed; its crystal structure consists of one-dimensional chains, formed by C(CN) sup−inf3 anions bridging between the CoII atoms. The CoII atom is nearly octahedrally coordinated by two tertiary nitrogens of 2-meiz and four nitrogens of C(CN) sup−inf3 . The spectra of these compounds and of the complexes with iz, as well as that of α-[Co{C(CN)3}2(4-meiz)2], indicate all these compounds to have basically the same bridging polymeric octahedral structure. However, the spectra indicate distorted tetrahedral structures for the remaining compounds.
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Hvastijová, M., Kožísek, J., Kohout, J. et al. X-ray crystallographic and physical investigation of tricyanomethanide and dicyanamide complexes of cobalt(II) with imidazole and its methyl derivatives. Transition Met Chem 20, 276–279 (1995). https://doi.org/10.1007/BF00143492
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DOI: https://doi.org/10.1007/BF00143492