Related Experiment Video
Updated: May 5, 2026
Synthesis of a Thiol Building Block for the Crystallization of a Semiconducting Gyroidal Metal-sulfur Framework
Published on: April 9, 2018
A cyanide-bridged molybdenum bis(maleonitriledithiolate) square
Moumita Bose1, Golam Moula, Sabyasachi Sarkar
1Department of Chemistry, Indian Institute of Technology, Kanpur , Kanpur 208016, Uttar Pradesh, India.
A new square complex, [Et4N]4[Mo4(μ-CN)4(mnt)8], was synthesized from [Et4N]2[Mo(IV)O(mnt)2] and Me3SiCN. This molybdenum-cyanide cluster exhibits strong antiferromagnetic interactions, influenced by its redox-active maleonitriledithiolate ligands.
Area of Science:
- Inorganic Chemistry
- Materials Science
- Computational Chemistry
Background:
- Molybdenum-oxomaleonitriledithiolate complexes are known for their unique electronic and magnetic properties.
- The synthesis of polynuclear molybdenum clusters offers opportunities to explore novel magnetic behaviors.
Purpose of the Study:
- To synthesize and characterize a novel square cluster complex of molybdenum.
- To investigate the magnetic properties and electronic structure of the newly synthesized cluster.
Main Methods:
- Reaction of tetraethylammonium bis(maleonitriledithiolato)oxomolybdate(IV) with trimethylsilyl cyanide under acidic conditions.
- Characterization of the resulting complex, [Et4N]4[Mo4(μ-CN)4(mnt)8] (1), using spectroscopic and crystallographic techniques.
- Magnetic susceptibility measurements and density functional theory (DFT) calculations to rationalize properties.
Main Results:
- High-yield synthesis of the square cluster complex [Et4N]4[Mo4(μ-CN)4(mnt)8] (1).
- Observation of strong antiferromagnetic interactions between adjacent molybdenum atoms within the cluster.
- Demonstration that the redox-active maleonitriledithiolate (mnt) ligands significantly influence the magnetic properties.
Conclusions:
- The synthesized molybdenum cluster exhibits significant magnetic coupling, suggesting potential for molecular magnetism applications.
- DFT calculations successfully explain the observed magnetic behavior and electronic structure.
- The study highlights the role of capping ligands in tuning the magnetic properties of polynuclear metal complexes.
More Related Videos
07:14Author Spotlight: Experimental Approaches for the Synthesis of Low-Valent Metal-Organic Frameworks from Multitopic Phosphine Linkers
Published on: May 12, 2023
10:42Combining Solid-state and Solution-based Techniques: Synthesis and Reactivity of ChalcogenidoplumbatesII or IV
Published on: December 29, 2016
Related Concept Videos
02:46Crystal Field Theory - Tetrahedral and Square Planar Complexes
Crystal field theory (CFT) is applicable to molecules in geometries other than octahedral. In octahedral complexes, the lobes of the dx2−y2 and dz2 orbitals point directly at the ligands. For tetrahedral complexes, the d orbitals remain in place, but with only four ligands located between the axes. None of the orbitals points directly at the tetrahedral ligands. However, the dx2−y2 and dz2 orbitals (along the Cartesian axes) overlap with the ligands less than...
02:57Coordination Number and Geometry
02:42Valence Bond Theory
04:01VSEPR Theory and the Effect of Lone Pairs
02:34Structural 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,...
02:51Metal-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...