Related Experiment Video
Updated: Sep 20, 2026

Experimental Approaches for the Synthesis of Low-Valent Metal-Organic Frameworks from Multitopic Phosphine Linkers
Published on: May 12, 2023
A novel cobalt(II) coordination polymer containing the fumarate anion and o-phenanthroline
Jian Fang Ma1, Jin Yang, Jing Fu Liu
1Department of Chemistry, Northeast Normal University, Changchun 130024, People's Republic of China. jfma@public.cc.jl.cn
Abstract:
The self-assembly of three crystallographically distinct fumarate ions, two unique cobalt(II) ions and two unique o-phenanthroline molecules results in a two-dimensional polymeric structure with the formula [Co(2)(C(4)H(2)O(4))(2)(C(12)H(8)N(2))(2)](n), namely di-mu-fumatato-bis(o-phenanthroline)dicobalt(II). The Co atoms are at the nodes of a two-dimensional array linked by coordinated fumarate ligands. Each Co atom is coordinated in a distorted octahedral manner to four fumarate O atoms and two N atoms from the chelating phenanthroline ligands.
Related Concept Videos
Valence Bond Theory
Coordination Compounds and Nomenclature
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...
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...
Coordination Number and Geometry
Colors and Magnetism
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human eye.
