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Synthesis, Crystal Structures, and Magnetic Studies of Two Six-Coordinate Nickel(II) Complexes with Tripodal Benzimidazole Ligands

Yuhang HeCollege of Science, Tianjin University of Science and Technology, 300457, Tianjin, ChinaJingwen ChenCollege of Biotechnology, Tianjin University of Science and Technology, 300457, Tianjin, ChinaXinran YuCollege of Chemical Engineering and Materials Science, Tianjin University of Science and Technology, 300457, Tianjin, ChinaHongming KaoCollege of Chemical Engineering and Materials Science, Tianjin University of Science and Technology, 300457, Tianjin, ChinaJing ChenCollege of Biotechnology, Tianjin University of Science and Technology, 300457, Tianjin, China

2022en

ABI

Annotatsiya

Herein, two nickel(II) complexes [Ni(ntb)(chdc)(CH3OH)]⋅CH3OH⋅3.5H2O (1) and [Ni2(ntb)2(btc)(CH3OH)R]⋅Cl⋅4CH3OH⋅H2O (2) (chdc is trans-1,4-cyclohexanedicarboxylate, btc is 1,3,5-benzenetricarboxylate, ntb is tris(2-benzimidazolylmethyl)amine, R = CH3OH/H2O) containing tetradentate poly-benzimidazole ligand have been synthesized and characterized by FT-IR spectroscopy, UV-Vis spectroscopy, elemental analysis, single‑crystal X‑ray diffraction, and magnetic analysis. X-ray crystallographic analysis shows that the Ni(II) ions in 1 and 2 have distorted octahedral geometries with four nitrogen atoms of ntb, one oxygen atom of carboxylate and one oxygen atom of H2O or CH3OH. Complex 1 is mononuclear with trans-1,4-cyclohexanedicarboxylate coordinated by Ni(II) in monodentate bonding fashion, and complex 2 consists of 1,3,5-benzenetricarboxylato-bridged nickel(II) centers in bis(monodentate) bonding mode. Hydrogen bonds and π–π interactions are important in stabilization of the crystal structures. The variable temperature magnetic susceptibilities of complexes 1 and 2 indicate that there are antiferromagnetic interactions.

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Identifikatorlar

DOI: 10.1134/s0036023622080162

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