Synthesis and Сrystal Structures of Nickel(II) Complexes Based on Tripodal Tetradentate Ligand

Two novel nickel-based complexes [Ni(H₂O)LCl]Cl (Ι) and [(Ni₂L₂Cl₂)](NO₃)₂ (ΙΙ) were synthesized with the tripodal tetradentate ligand (tris((1-methyl-1H-benzo[d]imidazol-2-yl)methyl)amine, L). Two complexes show different nuclearity and coordination environment of nickel atoms: complex Ι is assembled from two mononuclear T-shaped building units, forming a binuclear complex through intermolecular π–π interactions; the building unit of complex ΙΙ resembles complex Ι, but it leads to a diverse centrosymmetric binuclear complex due to the two bridging chlorine atoms. The crystal structures of the two complexes were determined by single-crystal X-ray diffraction (CCDC nos. 2363616 (Ι) and 2363615 (ΙΙ)).