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A new one‐dimensional Cd II coordination polymer incorporating 2,2′‐(1,2‐phenylene)bis(1 H ‐imidazole‐4,5‐dicarboxylate)
Author(s) -
Liu Yan-Ju,
Cheng Di,
Li Ya-Xue,
Zhang Jun-Di,
Yang Huai-Xia
Publication year - 2018
Publication title -
acta crystallographica section c
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 17
ISSN - 2053-2296
DOI - 10.1107/s2053229618012603
Subject(s) - imidazole , crystallography , octahedron , coordination polymer , hydrogen bond , chemistry , molecule , crystal structure , ligand (biochemistry) , coordination geometry , octahedral molecular geometry , stereochemistry , organic chemistry , biochemistry , receptor
Imidazole‐4,5‐dicarboxylic acid (H 3 IDC) and its derivatives are widely used in the preparation of new coordination polymers owing to their versatile bridging coordination modes and potential hydrogen‐bonding donors and acceptors. A new one‐dimensional coordination polymer, namely catena ‐poly[[diaquacadmium(II)]‐μ 3 ‐2,2′‐(1,2‐phenylene)bis(1 H ‐imidazole‐4,5‐dicarboxylato)], [Cd(C 16 H 6 N 4 O 8 ) 0.5 (H 2 O) 2 ] n or [Cd(H 2 Phbidc) 1/2 (H 2 O) 2 ] n , has been synthesized by the reaction of Cd(OAc) 2 ·2H 2 O (OAc is acetate) with 2,2′‐(1,2‐phenylene)bis(1 H ‐imidazole‐4,5‐dicarboxylic acid) (H 6 Phbidc) under solvothermal conditions. In the polymer, one type of Cd ion (Cd1) is six‐coordinated by two N atoms and two O atoms from one H 2 Phbidc 4− ligand and by two O atoms from two water molecules, forming a significantly distorted octahedral CdN 2 O 4 coordination geometry. In contrast, the other type of Cd ion (Cd2) is six‐coordinated by two N atoms and two O atoms from two symmetry‐related H 2 Phbidc 4− ligands and by two O atoms from two symmetry‐related water molecules, leading to a more regular octahedral coordination geometry. The Cd1 and Cd2 ions are linked by H 2 Phbidc 4− ligands into a one‐dimensional chain which runs parallel to the b axis. In the crystal, the one‐dimensional chains are connected through hydrogen bonds, generating a two‐dimensional layered structure parallel to the ab plane. Adjacent layers are further linked by hydrogen bonds, forming a three‐dimensional structure in the solid state.