Synthesis and Structure of Iron(II) Complex Compounds with 1-Methyl-2-Pyridine-2-yl-1Н- and 1-Methyl-2-Phenyliminomethyl-1Н-Benzimidazoles and Boron Cluster Anions [BnHn]²⁻ (n = 10, 12)

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Abstract

The paper studies reactions of iron(II) complexation with benzimidazole derivatives L (L1 = C13N3H11, L2 = C15N3H13) in the presence of salts of boron cluster anions [BnHn]2– (n = 10, 12). The obtained complex compounds of the general formula [FeL3][BnHn] are characterized by elemental analysis and IR spectroscopy. The structure of complex [FeL13][B10H10] is determined by single-crystal X-ray diffraction (CCDС № 2432134). The distorted octahedral environment of the Fe atom is formed by the imidazole and pyridine N atoms of three L1 molecules. In the crystal, the [FeL13]2+ complex has a meridional configuration. The Fe–N bond lengths for imidazolium nitrogen atoms are in the range of 1.954(8)–1.980(6) Å, and for pyridine nitrogen atoms 1.977(7)–2.011(8) Å.

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About the authors

V. V. Avdeeva

Institute of General and Inorganic Chemistry, Russian Academy of Sciences

Author for correspondence.
Email: avdeeva.varvara@mail.ru
Russian Federation, Moscow, 119991

A. S. Kubasov

Institute of General and Inorganic Chemistry, Russian Academy of Sciences

Email: avdeeva.varvara@mail.ru
Russian Federation, Moscow, 119991

S. E. Nikiforova

Institute of General and Inorganic Chemistry, Russian Academy of Sciences

Email: avdeeva.varvara@mail.ru
Russian Federation, Moscow, 119991

O. N. Belousova

Institute of General and Inorganic Chemistry, Russian Academy of Sciences

Email: avdeeva.varvara@mail.ru
Russian Federation, Moscow, 119991

E. A. Malinina

Institute of General and Inorganic Chemistry, Russian Academy of Sciences

Email: avdeeva.varvara@mail.ru
Russian Federation, Moscow, 119991

N. T. Kuznetsov

Institute of General and Inorganic Chemistry, Russian Academy of Sciences

Email: avdeeva.varvara@mail.ru
Russian Federation, Moscow, 119991

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Supplementary files

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2. Scheme 1. Coordination of ligands L¹ and L² in metal complexes.

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3. Scheme 2. Schematic structure of the meridional (a) and facet (b) isomers of the [Ni(L¹)₃]²⁺ cation, co-crystallized in the [Ni(L¹)₃][B₁₀H₁₀] complex [23].

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4. Scheme 3. Synthesis of complexes I–IV.

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5. Fig. 1. Structure of the [Fe(C₁₃N₃H₁₁)₃][B₁₀H₁₀] complex according to X-ray diffraction data of single crystals (a), fragment of the crystal packing of the crystal (b).

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6. Fig. 2. The dnorm Hirschfeld surface of the [B₁₀H₁₀]²⁻ anion in structure I (a). 2D unfolding of the Hirschfeld surface of the anion (b) and the boundaries of the H…H (c) and H…C (d) contacts.

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