Tetranuclear Hetro-Metal [MnIII2NiII2] Complexes Involving Defective Double-Cubane Structure: Synthesis, Crystal Structures, and Magnetic Properties

Tetranuclear hetero-metal MnIII2NiII2 complexes, [Mn2Ni2(L)4(OAc)2] (1) and [Mn2Ni2(L)4(NO3)2] (2) [H2L = N-(2-hydroxymethylphenyl)-5,6-benzosalicylideneimine], have been synthesized and characterized by X-ray crystal structure analyses, infrared spectra, and elemental analyses. The structure analys...

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Published inMagnetochemistry Vol. 5; no. 1; p. 14
Main Authors Suemitsu, Yuki, Matsunaga, Ryuji, Toyofuku, Takashi, Yamada, Yasunori, Mikuriya, Masahiro, Tokii, Tadashi, Koikawa, Masayuki
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 14.02.2019
Subjects
Antiferromagnetism
Bridges
Coordination compounds
Crystal defects
Crystal structure
Cubane
Dimers
double-cubane
hetero-metal complex
Infrared analysis
Infrared spectra
Ligands
Magnetic measurement
Magnetic properties
magnetic property
Manganese
Molecular structure
Nickel
Nitrates
Schiff-base ligand
tetranuclear complex
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Summary:Tetranuclear hetero-metal MnIII2NiII2 complexes, [Mn2Ni2(L)4(OAc)2] (1) and [Mn2Ni2(L)4(NO3)2] (2) [H2L = N-(2-hydroxymethylphenyl)-5,6-benzosalicylideneimine], have been synthesized and characterized by X-ray crystal structure analyses, infrared spectra, and elemental analyses. The structure analyses revealed that the complexes have a defective double-cubane metal core connected by μ3-alkoxo bridges. Complexes consist of two bis-μ-alkoxo bridged MnIIINiII heteronuclear units making a dimer-of-dimers structure. The double-cubane cores are significantly distorted due to an effect of syn–syn mode acetato or nitrato bridges. Magnetic measurements indicate that weak antiferromagnetic interactions (Mn-Ni = −0.66 ~ −4.19 cm–1) are dominant in the hetero-metal core.
ISSN:2312-7481
2312-7481
DOI:10.3390/magnetochemistry5010014