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Extended Network via #±# Interaction and Hydrogen Bond Linkages of ID Copper(II) Coordination Polymer: Synthesis, Crystal Structure and Characterization of [Cu(4,4′‐bpy) (2‐pzc)‐(H 2 O)] CIO 4 · H 2 O (2‐pzc = 2‐pyrazine‐5‐carboxylate; 4,4′‐bpy = 4, 4′‐bipyridine)
Author(s) -
JunHua Luo,
RuiHu Wang,
Rong Cao,
Lei Han,
JiaBao Weng,
ZhengZhong Lin,
LiHua Chen,
MaoChun Hong
Publication year - 2003
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.20030210511
Subject(s) - chemistry , point of zero charge , crystallography , ligand (biochemistry) , hydrogen bond , molecule , crystal structure , monoclinic crystal system , carboxylate , square pyramidal molecular geometry , coordination polymer , stereochemistry , aqueous solution , biochemistry , receptor , organic chemistry
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)]CIO 4 ·H z O (1), has been solvothermally synthesized and characterized. Complex 1 crystallizes in the monoclinic space group P 2 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 #±# 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.