Ni-II-Pyridyloximato Triangles with a Central mu(3)-OH Ligand: Magnetostructural Correlations

作者：Esteban Jordi^*; Font Bardia Merce; Escuer Albert

来源：European Journal of Inorganic Chemistry, 2013, 2013(30): 5274-5280.

DOI：10.1002/ejic.201300814

• Cluster compounds
• Coordination modes
• Magnetic properties
• Nickel

New examples of unusual (3)-OR/oximato-Ni-3 isolated triangles have been obtained by treatment of different nickel carboxylato salts with 2-pyridylcyanoxime, pyC{CN}NOH. Depending on the precursor and reaction conditions, compounds [Ni-3(MeOH)(2)(AcO)(OH)(pyC{CN}NO)(4)] (1), (NEt4)[Ni-3(H2O)(3-ClBzO)(2)(OH)(pyC{CN}NO)(4)] (2) and (NEt3H)[Ni-3(H2O)(3)(OH)(Ph2CHCOO)(3)(pyC{CN}NO)(3)] (3) were characterized. Direct current magnetic measurements performed in the 2-300 K temperature range revealed antiferromagnetic interactions induced by the (3)-OR/oximato superexchange pathway, quasi-frustration for 1 and 2, and an S = 0 ground state for 3. Magnetostuctural correlations derived from the experimental data confirmed the previous DFT predictions relating the magnitude of the superexchange interaction with the Ni-O-Ni bond angle.

• 出版日期2013-10-14