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

S. E. Nikiforova; Никифорова С. Е.; A. S. Kubasov; Кубасов А. С.; O. N. Belousova; Белоусова О. Н.; V. V. Avdeeva; Авдеева В. В.; E. A. Malinina; Малинина Е. А.; N. T. Kuznetsov; Кузнецов Н. Т.

doi:10.31857/S0044457X2260219X

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

Authors: Nikiforova S.E.¹, Kubasov A.S.¹, Belousova O.N.¹, Avdeeva V.V.¹, Malinina E.A.¹, Kuznetsov N.T.¹
Affiliations:
1. Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences
Issue: Vol 68, No 6 (2023)
Pages: 832-841
Section: КООРДИНАЦИОННЫЕ СОЕДИНЕНИЯ
URL: https://journals.rcsi.science/0044-457X/article/view/136490
DOI: https://doi.org/10.31857/S0044457X2260219X
EDN: https://elibrary.ru/UEQTWF
ID: 136490

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Abstract
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Abstract

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.

Keywords

coordination compounds, boron cluster anions, redox reactions, copper(II)

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