Extended Network via π…π Interaction and Hydrogen Bond Linkages of 1D Copper(II) Coordination Polymer: Synthesis, Crystal Structure and Characterization of [Cu(4,4′-bpy)(2-pzc)- (H_2O)]ClO_4·H_2O (2-pzc=2-pyrazine-5-carboxylate;4,4′-bpy=4,4'-bipyridine)  

作　　者：罗军华 陈丽华 洪茂椿 王瑞虎 曹荣 韩磊 翁家宝 林郑忠 

机构地区：[1]State Key Laboratory of Structural Chemistry, Fujian Institute of the Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China [2]Jian'ou Insitute of Environment Supervision, Fujian 353100, China

出　　处：《Chinese Journal of Chemistry》2003年第5期525-530,共6页中国化学（英文版）

基　　金：ProjectsupportedbytheNationalNaturalScienceFoundation (No .2 982 5 10 3 )ofChina ;theNaturalScienceFoundation (No .8982 0 0 3 )ofFu jianProvinceandChineseAcademyofSciences .

摘　　要：A penta coordinated Cu(II) complex with mixed ligands 4,4′ bipyridine (4,4′ bpy) and 2 pyrazine 5 carboxylate anion (2 pzc), \[Cu(4,4′ bpy)(2 pzc)(H 2 O)\]ClO 4 ·H 2 O (1), has been solvothermally synthesized and characterized. Complex 1 crystallizes in the monoclinic space group P2 1 /n with a =0 82996(2) nm, b =1 58156(5) nm, c =1 53837(1) nm, β =103 536(2)°, V =1 96322(8) nm 3 , M r =478 30, Z =4, D c =1 618 g/cm 3 , final R = 0 0544 and wR =0 1487. The Structure of 1 indicates that the central Cu(II) atom is penta coordinated by two N atoms from two 4,4′ bpy ligands, and one N atom and one oxygen atom of the 2 pzc ligand in the equatorial plane, and one oxygen atom of the coordinated water molecule at the axial position. The coordination geometry of Cu(II) atom could be considered as a slightly distorted square pyramidal environment. The 4,4′ bpy ligands bridge the Cu(II) centers to form a one dimensional chain, and 2 pzc acts as a terminal chelated ligand, and π…π interaction between the pyrazine rings of 2 pzc ligands of adjacent chains links the chains into a 2D sheet. Furthermore, the hydrogen bonds among the oxygen atoms of the uncoordinated water molecules and the N atoms and O atoms of 2 pzc ligands and the oxygen atoms of the coordinated water molecules link the sheets into the ultimate 3D network of complex 1.A penta coordinated Cu(II) complex with mixed ligands 4,4′ bipyridine (4,4′ bpy) and 2 pyrazine 5 carboxylate anion (2 pzc), \[Cu(4,4′ bpy)(2 pzc)(H 2 O)\]ClO 4 ·H 2 O (1), has been solvothermally synthesized and characterized. Complex 1 crystallizes in the monoclinic space group P2 1 /n with a =0 82996(2) nm, b =1 58156(5) nm, c =1 53837(1) nm, β =103 536(2)°, V =1 96322(8) nm 3 , M r =478 30, Z =4, D c =1 618 g/cm 3 , final R = 0 0544 and wR =0 1487. The Structure of 1 indicates that the central Cu(II) atom is penta coordinated by two N atoms from two 4,4′ bpy ligands, and one N atom and one oxygen atom of the 2 pzc ligand in the equatorial plane, and one oxygen atom of the coordinated water molecule at the axial position. The coordination geometry of Cu(II) atom could be considered as a slightly distorted square pyramidal environment. The 4,4′ bpy ligands bridge the Cu(II) centers to form a one dimensional chain, and 2 pzc acts as a terminal chelated ligand, and π…π interaction between the pyrazine rings of 2 pzc ligands of adjacent chains links the chains into a 2D sheet. Furthermore, the hydrogen bonds among the oxygen atoms of the uncoordinated water molecules and the N atoms and O atoms of 2 pzc ligands and the oxygen atoms of the coordinated water molecules link the sheets into the ultimate 3D network of complex 1.

关 键 词：crystal structure 4 4'  bipyridine 2  pyrazine  5  carboxylic copper(II) polymer π…π interaction and hydrogen bonding 

分 类 号：O641.1[理学—物理化学]