CRYSTAL STRUCTURES AND LUMINESCENCE OF TWO ZINC(II) COMPLEXES WITH BENZIMIDAZOLE LIGANDS
S.B. Miao, B.M. Ji, D.S. Deng, C. Xu, N. Ma
Keywords: crystal structure, fluorescence, dimethylformamide
Pages: 399-403
Abstract
Two new zinc(II) complexes have been synthesized and studied by single crystal X-ray diffraction method: [Zn(L1)Cl2]·2DMF (1) and [Zn(L2)Cl2]·DMF (2) (L1 = 3,3′-bis(2-benzimidazolyl)-2,2′-dipyridine, L2 = 3,3′-bis[2-bis(2-ethylbenzimidazolyl)]-2,2′-dipyridine). Compound 1 is monoclinic, C2/c, a = 23.142(3), b = 11.845(1), c = 14.735(3) Å; compound 2 is orthorhombic, C2221, a = 12.140(7), b = 16.283(9), c = 16.51(1) Å. In both compounds, Zn(II) cations are coordinated by two chlorine atoms and two benzimidazole nitrogen atoms in a slightly distorted tetrahedron fashion. Structural features responsible for fluorescent properties of the complexes are discussed.
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