Structural characterization of two solvates of a luminescent copper(II) bis­(pyridine)-substituted benzimidazole complex

Acta Crystallographica Section E: Crystallographic Communications

Lewis, R.A.¹  Geiger, D.K.¹  DeStefano, M.R.¹ 

[1] Department of Chemistry, SUNY-College at Geneseo, Geneseo, NY 14454, USA

关键词: CRYSTAL STRUCTURE;    COPPER(II);    BENZIMIDAZOLE;    HYDROGEN BONDING;    [PI]-[PI] INTERACTIONS;    C-H...[PI] INTERACTIONS;   

DOI  :  10.1107/S2056989017014232

学科分类：数学（综合）

来源: International Union of Crystallography

【 摘 要 】

Copper(II) complexes of benzimidazole are known to exhibit biological activity that makes them of inter­est for chemotherapeutic and other pharmaceutical uses. The complex bis­(acetato-κO){5,6-dimethyl-2-(pyridin-2-yl)-1-[(pyridin-2-yl)meth­yl]-1H-benzimidazole-κ2N2,N3}copper(II), has been prepared. The absorption spectrum has features attributed to intra­ligand and ligand-field transitions and the complex exhibits ligand-centered room-temperature luminescence in solution. The aceto­nitrile monosolvate, [Cu(C2H3O2)2(C20H18N4)]·C2H3N (1), and the ethanol hemisolvate, [Cu(C2H3O2)2(C20H18N4)]·0.5C2H6O (2), have been structurally characterized. Compound 2 has two copper(II) complexes in the asymmetric unit. In both 1 and 2, distorted square-planar N2O2 coordination geometries are observed and the Cu—N(Im) bond distance is slightly shorter than the Cu—N(py) bond distance. Inter­molecular π–π inter­actions are found in 1 and 2. A weak C—H⋯π inter­action is observed in 1.

【 授权许可】

CC BY