The C–HCl2Cu(II) synthon in the structural direction and assembly of supramolecular complexes with the 3,3′-bis(2-benzimidazolyl)-2,2′-dipyridine ligand and its N-substituted derivatives |
| |
Authors: | Bao-Ming Ji Shao-Bin Miao Dong-Sheng Deng Chen-Xia Du |
| |
Institution: | aCollege of Chemistry and Chemical Engineering, Luoyang Normal University, Luoyang 471022, PR China;bDepartment of Chemistry, Zhengzhou University, Zhengzhou 450052, PR China |
| |
Abstract: | Three new Cu(II) supramolecular complexes Cu(L1)Cl2]·2DMF (1), Cu(L2)Cl2] (2) and Cu(L3)Cl2]·DMF (3) (L1 = 3,3′-bis(2-benzimidazolyl)-2,2′-dipyridine, L2 = 3,3′- bis(N-ethyl-2-benzimidazolyl)-2,2′-dipyridine and L3 = 3,3′-bis(N-benzyl-2-benzimidazolyl)-2,2′-dipyridine) have been prepared and characterized by elemental analysis, IR spectra and single crystal X-ray diffraction. X-ray structural analysis of L1, L2·3.5H2O and L3·H2O indicates that all three ligands adopt the trans conformation with the two benzimidazole fragments located on opposite sides of the dipyridyl backbone. While in complexes 1–3, all the ligands display the cis conformation and behave as bidentate chelating reagents to coordinate with Cu(II). The inorganic chloride ions always act as a reliable hydrogen bonded acceptor in these structures, and the resulting C–HCl2Cu supramolecular synthons play a significant role in the formation and stabilization of the structures. Moreover, additional non-covalent interactions, such as C–Hπ, are also identified to extend the discrete (0-D) or low-dimensional (1-D) motifs into high-dimensional architectures. |
| |
Keywords: | 3 3′ -Bis(2-benzimidazolyl)-2 2′ -dipyridine Crystal structure Cu(II) complex C– HCl and C– Hπ interactions Metallosupramolecular architecture |
本文献已被 ScienceDirect 等数据库收录! |
|