4.1 Article

Features of Cadmium(II) Complexation with N-Donor Heterocyclic Ligands in the Presence of the Octadecahydroeicosaborate Anion

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MAIK NAUKA/INTERPERIODICA/SPRINGER
DOI: 10.1134/S0036023623601794

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cadmium(II); octadecahydroeicosaborate anion; azaheterocycles; benzimidazole derivatives

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The process of cadmium(II) complexation with different organic ligands in the presence of [trans-B20H18](2-) has been studied, and it has been found that the nature of the ligand affects the composition and structures of the resulting compounds.
The process of cadmium(II) complexation with 1-ethyl-2-(4-methoxyphenyl)azobenzimidazole (L-1), 2,2 '-bipyridyl (L-2), and 1,10-phenanthroline (L-3) in the presence of the [trans-B20H18](2-) anion has been studied. It has been found that the nature of the organic ligand affects the composition and structures of the resulting compounds. Complexation with ligand L-1, a benzimidazole derivative, has yielded binuclear complex [(CdL2NO3)-N-1(mu-NO3)CdL1(NO3)(2)] (1), which contains no boron cluster anion. In the case of azaheterocyclic ligands L2 and L3, depending on the Cd : L ratio, heteroleptic complexes [CdL2NO3](2)[trans-B20H18] (L = L-2 (2); L-3 (3)) with coordinated nitrate ions (Cd : L = 1 : 2) or tris-chelate complexes [CdL3][trans-B20H18] (L = L-2 (4); L-3 (5)) with the boron cluster anion as a counterion (Cd : L = 1 : 3) have been isolated. The structures of complexes [(CdL2NO3)-N-1(mu-NO3)CdL1(NO3)(2)] (1) and [Cd(L-2)(2)NO3](2)[trans-B20H18] (2) have been determined by X-ray diffraction.

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