6533b86ffe1ef96bd12ce694

RESEARCH PRODUCT

Hexanuclear manganese(III) single-molecule magnets based on oxime and azole-type ligands

José Martínez-lilloCarlos Rojas-dottiNicolás MolinerFrancesc Lloret

subject

010405 organic chemistryLigandMetal ions in aqueous solutionRelaxation (NMR)chemistry.chemical_elementManganeseTriclinic crystal system010402 general chemistry01 natural sciencesMagnetic susceptibility0104 chemical sciencesInorganic ChemistryCrystallographyMagnetizationchemistryMaterials ChemistryMoleculePhysical and Theoretical Chemistry

description

Abstract Two novel hexanuclear manganese(III) complexes belonging to the Mn6 family of single-molecule magnets (SMMs), of formulae [Mn6(μ3-O)2(H2N-sao)6(bta)2(EtOH)6]·2EtOH·4H2O (1) and [Mn6(μ3-O)2(H2N-sao)6(pta)2(EtOH)6]·4EtOH (2) [H2N-saoH2 = salicylamidoxime, bta = 1,2,3-benzotriazolate anion, pta = 5-phenyl-tetrazolate anion], have been synthesized and characterized structurally and magnetically. Both compounds crystallize in the triclinic system with space group P 1 ¯ (1 and 2). In their crystal packing, adjacent Mn6 complexes are connected through non-coordinating solvent molecules, which are H-bonded to N atoms of azole rings and –NH2 groups of salicylamidoxime ligand. The study of the magnetic properties of 1 and 2 through magnetic susceptibility measurements reveals as predominant interaction an antiferromagnetic coupling between the MnIII metal ions in both compounds. A ground state spin value of S = 4 for 1 and 2 was confirmed through variable temperature-variable field dc magnetization data, and the occurrence of slow relaxation of the magnetization in both 1 and 2 indicates single-molecule magnet behavior.

yearjournalcountryeditionlanguage
2019-09-01Polyhedron
https://doi.org/10.1016/j.poly.2019.05.044