Molecule-Based Magnets: Ferro- and Antiferromagnetic Interactions in Nickel(II) Cyclohexasiloxanolate Sandwich Complexesстатья
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Аннотация:Ferromagnetic exchange-coupling interactions mediated by siloxanolate ligands have been detected in the two nickel(II) nanoscale clusters Na-2[(PhSiO(2))(6)Na4Ni4(OH)(2)(O-2-SiPh)(6)]. 16Bu(n)OH (1) and Na-2[(PhSiO(2))(6)Ni-6(O(2)SiPh)(6)Cl]. 12CH(3)OH . H2O (2), which qualify as interesting precursors for new molecule-based magnetic materials. Complex 1 has an S = 4 spin ground state, whereas complex 2 has an S = 0 spin ground state. due to the presence of additional antiferromagnetic interactions through the encapsulated mu(6)-chloride ion.