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

Masayuki Koikawa; Masaaki Ohba; Tadashi Tokii

doi:10.1016/j.poly.2005.03.084

Syntheses, structures, and magnetic properties of tetranuclear Ni ₄^II and Ni₂^IIMn₂ ^III complexes with ONO tridentate ligands

Masayuki Koikawa
, Masaaki Ohba
, Tadashi Tokii

Research output: Contribution to journal › Article › peer-review

46 Citations (Scopus)

Abstract

Tetranuclear Ni₄^II and Ni₂ ^IIMn₂^III 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 Ni^II-Mn^III 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 (J_NiMn = 1.5 cm^-1, J_NiNi = 20 cm^-1) are dominant in this hetero-metal core.

Original language	English
Pages (from-to)	2257-2262
Number of pages	6
Journal	Polyhedron
Volume	24
Issue number	16-17
DOIs	https://doi.org/10.1016/j.poly.2005.03.084
Publication status	Published - Nov 17 2005
Externally published	Yes

All Science Journal Classification (ASJC) codes

Physical and Theoretical Chemistry
Inorganic Chemistry
Materials Chemistry

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10.1016/j.poly.2005.03.084

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@article{8faabd5e858b4f7e9a86572b410abda0,

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

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.",

author = "Masayuki Koikawa and Masaaki Ohba and Tadashi Tokii",

note = "Funding Information: This work was supported by Grants-in-Aid for Science Research (C) (No. 15510092) and Grants-in-Aid for Encouragement of Young Scientists (No. 13740380) from the Ministry of Education, Science, Sports and Culture of Japan. ",

year = "2005",

month = nov,

day = "17",

doi = "10.1016/j.poly.2005.03.084",

language = "English",

volume = "24",

pages = "2257--2262",

journal = "Polyhedron",

issn = "0277-5387",

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number = "16-17",

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TY - JOUR

T1 - Syntheses, structures, and magnetic properties of tetranuclear Ni 4II and Ni2IIMn2 III complexes with ONO tridentate ligands

AU - Koikawa, Masayuki

AU - Ohba, Masaaki

AU - Tokii, Tadashi

N1 - Funding Information: This work was supported by Grants-in-Aid for Science Research (C) (No. 15510092) and Grants-in-Aid for Encouragement of Young Scientists (No. 13740380) from the Ministry of Education, Science, Sports and Culture of Japan.

PY - 2005/11/17

Y1 - 2005/11/17

N2 - 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.

AB - 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.

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U2 - 10.1016/j.poly.2005.03.084

DO - 10.1016/j.poly.2005.03.084

M3 - Article

AN - SCOPUS:27644444786

SN - 0277-5387

VL - 24

SP - 2257

EP - 2262

JO - Polyhedron

JF - Polyhedron

IS - 16-17

ER -

Syntheses, structures, and magnetic properties of tetranuclear Ni ₄^II and Ni₂^IIMn₂ ^III complexes with ONO tridentate ligands

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