Features of Copper(I) Complexation with Benzimidazole Derivatives in the Presence of the closo-Dodecaborate Anion.

Autor: Nikiforova, S. E., Kubasov, A. S., Belousova, O. N., Avdeeva, V. V., Malinina, E. A., Kuznetsov, N. T.
Zdroj: Russian Journal of Inorganic Chemistry; Jun2023, Vol. 68 Issue 6, p744-752, 9p
Abstrakt: The process of copper(I) complexation with organic ligands as luminophores 1-(1-methylbenzimidazol-2-yl)-N-phenylmethanimine (L1), 1-ethyl-2-(4-methoxyphenyl)azobenzimidazole (L2), and 1-(1-benzylbenzimidazol-2-yl)-N-cyclohexylmethanimine (L3) in the presence of the closo-dodecaborate anion [B12H12]2– has been studied. It has been shown that in acetonitrile, a redox reaction proceeds to form copper(II) tris-chelate complexes [CuIIL3][B12H12]. Using diiodomethane as a solvent, we have succeeded in stabilizing copper in the +1 oxidation state; as a result, mixed-ligand binuclear complexes [CuI2L2(μ-I)2] containing no boron cluster anion have been isolated. The structures of complexes [CuII(L1)3][B12H12] and [CuI2(L3)2(μ‑I)2] have been determined by X-ray diffraction. [ABSTRACT FROM AUTHOR]
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