Related Experiment Video
Updated: May 22, 2026

Self-assembling Morphologies Obtained from Helical Polycarbodiimide Copolymers and Their Triazole Derivatives
Published on: February 7, 2017
catena-Poly[[diaqua-bis(1H-imidazole-κN(3))cobalt(II)]-μ-2,3,5,6-tetra-chloro-tereph-thal-ato-κ(2)O(1):O(4)]
Chang-Ge Zheng1, Peng Zhang, Ping Li
1School of Chemical and Materials Engineering, Jiangnan University, 1800 Lihu Road, Wuxi, Jiangsu Province 214122, People's Republic of China.
Abstract:
In the title compound, [Co(C(8)Cl(4)O(4))(C(3)H(4)N(2))(2)(H(2)O)(2)](n), the Co(II) ion displays a distorted octa-hedral coordination geometry with two O atoms from two monodentate tetra-chloro-terephthalate dianions, two N atoms from two imidazole mol-ecules and two O atoms from two water mol-ecules. The Co(II) ions are connected via the tetra-chloro-terephthalate dianions into a chain running along the crystallographic [110] direction. Adjacent chains are linked into a two-dimensional network arranged parallel to (010) by classical N-H⋯O and O-H⋯O hydrogen bonds.
Related Concept Videos
[4+2] Cycloaddition of Conjugated Dienes: Diels–Alder Reaction
Metal-Ligand Bonds
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
Coordination Compounds and Nomenclature
Structural Isomerism
Isomers are different chemical species that have the same chemical formula. Structural isomerism of coordination compounds can be divided into two subcategories, the linkage isomers and coordination-sphere isomers.
Linkage isomers occur when the coordination compound contains a ligand that can bind to the transition metal center through two different atoms. For example, the CN− ligand can bind through the carbon atom or through the nitrogen atom. Similarly, SCN− can be...
Valence Bond Theory
Complexometric Titration: Ligands

