Syntheses, structures, and magnetic properties of tetranuclear Ni 4II and Ni2IIMn2 III complexes with ONO tridentate ligands

Masayuki Koikawa, Masaaki Ohba, Tadashi Tokii

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Abstract

Tetranuclear Ni4II and Ni2 IIMn2III complexes of N-(2-hydroxymethylphenyl) salicylideneimine (H2L1), [Ni4Cl2(L1) 2(HL1)2] (1), [Mn2Ni2Cl 2(L1)4(H2O)2] (2), and Ni(II) 4 complex of N-(2-hydroxymethylphenyl)salicylamine (H2L2), [Ni4(L2)4(CH3OH)2] (3) have been characterized by X-ray crystal structure analyses and magnetic measurements. The structure analyses revealed that complexes 1 and 2 have a defective double-cubane metal core connected by μ3-alkoxo bridges. Complex 1 contains two types of tridentate ligands coordinating as dianionic (L1 2-) and monoanionic (HL1-). The double-cubane core of 1 is significantly distorted due to an effect of chloride anions as bridging atoms. Complex 2 consists of two μ-phenoxo NiII-MnIII heteronuclear units making a dimer-of-dimers structure. Complex 3 contains dianionic (L2)2- ligands and forms Ni4II cubane core. Magnetic measurements of complex 2 indicate that a weak ferromagnetic interactions (JNiMn = 1.5 cm-1, JNiNi = 20 cm-1) are dominant in this hetero-metal core.

Original languageEnglish
Pages (from-to)2257-2262
Number of pages6
JournalPolyhedron
Volume24
Issue number16-17
DOIs
Publication statusPublished - Nov 17 2005
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

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