Back to Search
Start Over
Experimental and computational study of the exchange interaction between the V(III) centers in the vanadium-cyclal dimer.
- Source :
- Dalton Transactions: An International Journal of Inorganic Chemistry; 12/14/2023, Vol. 52 Issue 46, p17389-17397, 9p
- Publication Year :
- 2023
-
Abstract
- [V<subscript>2</subscript>(HCyclal)<subscript>2</subscript>] is prepared by controlled oxidation of vanadium nanoparticles at 50 °C in toluene. The V(0) nanoparticles are synthesized in THF by reduction of VCl<subscript>3</subscript> with lithium naphthalenide. They exhibit very small particle sizes of 1.2 ± 0.2 nm and a high reactivity (e.g. with air or water). By reaction of V(0) nanoparticles with the azacrown ether H<subscript>4</subscript>Cyclal, [V<subscript>2</subscript>(HCyclal)<subscript>2</subscript>] is obtained with deep green crystals and high yield. The title compound exhibits a V(III) dimer (V⋯V: 304.1(1) pm) with two deprotonated [HCyclal]<superscript>3−</superscript> ligands as anions. V(0) nanoparticles as well as the sole coordination of V(III) by a crown ether as the ligand and nitrogen as sole coordinating atom are shown for the first time. Magnetic measurements and computational results point to antiferromagnetic coupling within the V(III) couple, establishing an antiferromagnetic spin S = 1 dimer with the magnetic susceptibility determined by the thermal population of the total spin ranging from S<superscript>T</superscript> = 0 to S<superscript>T</superscript> = 2. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 14779226
- Volume :
- 52
- Issue :
- 46
- Database :
- Complementary Index
- Journal :
- Dalton Transactions: An International Journal of Inorganic Chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 173894984
- Full Text :
- https://doi.org/10.1039/d3dt03243d