Two Cd(Ⅱ) and Cu(Ⅱ) Complexes Based on 1-Butylbenzimidazole: Crystal Structures and Weak Interactions  

作　　者：杨晓琼 马恩忠 郑占英 吴秀梅 柳清湘 

机构地区：[1]Tianjin Key Laboratory of Structure and Performance for Functional Molecule,College of Chemistry and Life Science, Tianjin Normal University [2]State Key Laboratory of Element-organic Chemistry,Nankai University

出　　处：《Chinese Journal of Structural Chemistry》2010年第4期625-631,共7页结构化学（英文）

基　　金：Supported by the National Natural Science Foundation of China (No. 20872111);Natural Science Foundation of Tianjin (07JCYBJC00300)

摘　　要：1-Butylbenzimidazole L reacted with Cd（NO3）2·4H2O to afford complex [CdL（NO3）3H2O]·[HL] 1. The heptacoordinated Cd（Ⅱ） center adopts a distorted pentagongal bipyramidal geometry, and complex [CdL（NO3）3H2O]-entity and the protonated benzimidazium salt [HL]＋ are connected via N–H···O hydrogen bond to form a dimeric unit [CdL（NO3）3H2O]·[HL]. A 3-D supramolecular network of 1 is formed through N–H···O and O–H···O hydrogen bonds together with π-π stacking interactions. Reaction of L with CuCl2 afforded a mononuclear complex, [CuL2Cl2] 2, in which the tetracoordinated Cu（II） center adopts a distorted tetrahedral geometry. In contrast, 2-D supramolecular layers of 2 are formed by C–H···Cl hydrogen bonds. The fluorescent emission spectra of L, 1 and 2 are described.1-Butylbenzimidazole L reacted with Cd（NO3）2·4H2O to afford complex [CdL（NO3）3H2O]·[HL] 1. The heptacoordinated Cd（Ⅱ） center adopts a distorted pentagongal bipyramidal geometry, and complex [CdL（NO3）3H2O]-entity and the protonated benzimidazium salt [HL]＋ are connected via N–H···O hydrogen bond to form a dimeric unit [CdL（NO3）3H2O]·[HL]. A 3-D supramolecular network of 1 is formed through N–H···O and O–H···O hydrogen bonds together with π-π stacking interactions. Reaction of L with CuCl2 afforded a mononuclear complex, [CuL2Cl2] 2, in which the tetracoordinated Cu（II） center adopts a distorted tetrahedral geometry. In contrast, 2-D supramolecular layers of 2 are formed by C–H···Cl hydrogen bonds. The fluorescent emission spectra of L, 1 and 2 are described.

关 键 词：1-butylbenzimidazole cadmium（Ⅱ） copper（II） π-π interactions hydrogen bonds 

分 类 号：O626.23[理学—有机化学]