Related Experiment Video
Updated: Jul 10, 2026

Synthesis of Triazole and Tetrazole-Functionalized Zr-Based Metal-Organic Frameworks Through Post-Synthetic Ligand Exchange
Published on: June 23, 2023
Bis[diaquabis(2,2-bipyridine N,N'-dioxide-kappa2O,O')cobalt(II)] xi-octamolybdate dihydrate
1Department of Chemistry, Northeast Normal University, Changchun 130024, People's Republic of China.
Abstract:
The title organic-inorganic hybrid compound, [Co(C(10)H(8)N(2)O(2))(2)(H(2)O)(2)](2)[Mo(8)O(26)].2H(2)O, consists of [Co(bpdo)(2)(H(2)O)(2)](2+) (bpdo is 2,2-bipyridine N,N'-dioxide) and xi-[Mo(8)O(26)](4-) groups in a 2:1 ratio, plus two water solvent molecules. The independent Co atom in the cation is coordinated by four O atoms from two bpdo ligands and two water molecules, in a distorted octahedral geometry. The counter-anions, built up around a symmetry center, are linked by solvent water molecules through O-H...O hydrogen bonds to generate two-dimensional layers, which are in turn linked by coordinated water molecules from the cationic units through further O-H...O hydrogen bonds, forming a three-dimensional supramolecular structure.
Related Concept Videos
Valence Bond Theory
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...
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.
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...
Molecular Orbital Theory II

