Substantial exchange coupling for {Mo-NCS-M} combination: illustration for 1-D [{Mo(NCS)6}{NiL}2(NCS)]n

Area of Science:

• Inorganic Chemistry
• Materials Science
• Quantum Chemistry

Background:

• Antiferromagnetic interactions are crucial for developing advanced magnetic materials.
• Metal-organic compounds offer tunable magnetic properties.
• NCS-bridged complexes provide a platform for studying magnetic exchange interactions.

Purpose of the Study:

• To synthesize and characterize a novel NCS-bridged {Mo(III)-Ni} compound.
• To investigate the magnetic properties, specifically the antiferromagnetic interaction, of the new compound.
• To compare its magnetic behavior with homologous chromium-nickel derivatives.

Main Methods:

• Synthesis of the [{Mo(NCS)6}{NiL}2(NCS)]n compound.
• Magnetic susceptibility measurements to determine interaction strength.
• Density Functional Theory (DFT) calculations for spin distribution analysis.

Main Results:

• An antiferromagnetic interaction of J = -51 cm(-1) was determined for the {Mo(III)-Ni} compound.
• This interaction strength is double that observed in the analogous {Cr(III)-Ni} compound.
• DFT calculations indicated significant spin density on the sulfur atoms of the {Mo(NCS)6}(3-) unit.

Conclusions:

• The {Mo(III)-Ni} compound displays enhanced antiferromagnetism compared to its {Cr(III)-Ni} analog.
• The observed magnetic properties are influenced by the electronic structure and spin distribution, particularly on sulfur atoms.
• This study contributes to understanding magnetic exchange mechanisms in NCS-bridged transition metal complexes.