Antiferromagnetism induced by successive protonation of terminal phenol groups of a bis(μ-phenoxide)-bridged dicopper(II,II) complex

Hiromi Saimiya; Yukinari Sunatsuki; Masaaki Kojima; Setsuo Kashino; Takashi Kambe; Masakazu Hirotsu; Haruo Akashi; Kiyohiko Nakajima; Tadashi Tokii

Antiferromagnetism induced by successive protonation of terminal phenol groups of a bis(μ-phenoxide)-bridged dicopper(II,II) complex

Hiromi Saimiya, Yukinari Sunatsuki, Masaaki Kojima, Setsuo Kashino, Takashi Kambe, Masakazu Hirotsu, Haruo Akashi, Kiyohiko Nakajima, Tadashi Tokii

研究成果 › 査読

34 被引用数 (Scopus)

抄録

The reaction of a tripodal ligand (H₂L = N,N-bis(2-hydroxybenzyl)-N′,N′-dimethylethylenediamine) with (Cu(NO₃)₂·3H₂O and Cu(ClO₄)₂·6H₂O in methanol yielded [Cu₂(HL)₂](NO₃)₂·H ₂O (1) and [Cu₂(HL)₂](ClO₄)₂ (1′), respectively. When H₂L was allowed to react with CuSO₄·5H₂O in the presence of triethylamine (1:1:2) in methanol, the neutral dicopper(II,II) complex [Cu₂(L)₂] (2) was obtained. The monopositive species [Cu₂(L)(HL)]ClO₄·CH₃OH·H ₂O (3) crystallized on mixing 1′ and 2(1:1) in methanol-dichloromethane. The crystal structures of 1,2, and 3 were determined by X-ray crystallography. All of the complexes consist of a discrete dinuclear molecule with bis(μ-phenoxide)-bridges. The tripodal ligand functions as a tetradentate ligand and one of the phenolic oxygen atoms serves as a bridging ligand. Protonation/deprotonation takes place at the terminal phenol moiety and as the phenol group is deprotonated the coordination geometry changes from a distorted square pyramid to a distorted trigonal bipyramid. The two copper ions in 1-3 are antiferromagnetically coupled with 2J = -714 (1), -19.9 (2), -277 cm^-1 (3). The results clearly demonstrate that protonation/deprotonation causes a change in coordination geometry, which in turn drastically affects magnetic exchange interactions.

本文言語	English
ページ（範囲）	3737-3742
ページ数	6
ジャーナル	Journal of the Chemical Society, Dalton Transactions
号	19
出版ステータス	Published - 10月 29 2002

ASJC Scopus subject areas

化学 (全般)

他のファイルとリンク

フィンガープリント

「Antiferromagnetism induced by successive protonation of terminal phenol groups of a bis(μ-phenoxide)-bridged dicopper(II,II) complex」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル

@article{01b850ac695d4f60907af42c09f883df,

title = "Antiferromagnetism induced by successive protonation of terminal phenol groups of a bis(μ-phenoxide)-bridged dicopper(II,II) complex",

abstract = "The reaction of a tripodal ligand (H2L = N,N-bis(2-hydroxybenzyl)-N′,N′-dimethylethylenediamine) with (Cu(NO3)2·3H2O and Cu(ClO4)2·6H2O in methanol yielded [Cu2(HL)2](NO3)2·H 2O (1) and [Cu2(HL)2](ClO4)2 (1′), respectively. When H2L was allowed to react with CuSO4·5H2O in the presence of triethylamine (1:1:2) in methanol, the neutral dicopper(II,II) complex [Cu2(L)2] (2) was obtained. The monopositive species [Cu2(L)(HL)]ClO4·CH3OH·H 2O (3) crystallized on mixing 1′ and 2(1:1) in methanol-dichloromethane. The crystal structures of 1,2, and 3 were determined by X-ray crystallography. All of the complexes consist of a discrete dinuclear molecule with bis(μ-phenoxide)-bridges. The tripodal ligand functions as a tetradentate ligand and one of the phenolic oxygen atoms serves as a bridging ligand. Protonation/deprotonation takes place at the terminal phenol moiety and as the phenol group is deprotonated the coordination geometry changes from a distorted square pyramid to a distorted trigonal bipyramid. The two copper ions in 1-3 are antiferromagnetically coupled with 2J = -714 (1), -19.9 (2), -277 cm-1 (3). The results clearly demonstrate that protonation/deprotonation causes a change in coordination geometry, which in turn drastically affects magnetic exchange interactions.",

author = "Hiromi Saimiya and Yukinari Sunatsuki and Masaaki Kojima and Setsuo Kashino and Takashi Kambe and Masakazu Hirotsu and Haruo Akashi and Kiyohiko Nakajima and Tadashi Tokii",

year = "2002",

month = oct,

day = "29",

language = "English",

pages = "3737--3742",

journal = "Dalton Transactions",

issn = "1477-9226",

publisher = "Royal Society of Chemistry",

number = "19",

}

TY - JOUR

T1 - Antiferromagnetism induced by successive protonation of terminal phenol groups of a bis(μ-phenoxide)-bridged dicopper(II,II) complex

AU - Saimiya, Hiromi

AU - Sunatsuki, Yukinari

AU - Kojima, Masaaki

AU - Kashino, Setsuo

AU - Kambe, Takashi

AU - Hirotsu, Masakazu

AU - Akashi, Haruo

AU - Nakajima, Kiyohiko

AU - Tokii, Tadashi

PY - 2002/10/29

Y1 - 2002/10/29

N2 - The reaction of a tripodal ligand (H2L = N,N-bis(2-hydroxybenzyl)-N′,N′-dimethylethylenediamine) with (Cu(NO3)2·3H2O and Cu(ClO4)2·6H2O in methanol yielded [Cu2(HL)2](NO3)2·H 2O (1) and [Cu2(HL)2](ClO4)2 (1′), respectively. When H2L was allowed to react with CuSO4·5H2O in the presence of triethylamine (1:1:2) in methanol, the neutral dicopper(II,II) complex [Cu2(L)2] (2) was obtained. The monopositive species [Cu2(L)(HL)]ClO4·CH3OH·H 2O (3) crystallized on mixing 1′ and 2(1:1) in methanol-dichloromethane. The crystal structures of 1,2, and 3 were determined by X-ray crystallography. All of the complexes consist of a discrete dinuclear molecule with bis(μ-phenoxide)-bridges. The tripodal ligand functions as a tetradentate ligand and one of the phenolic oxygen atoms serves as a bridging ligand. Protonation/deprotonation takes place at the terminal phenol moiety and as the phenol group is deprotonated the coordination geometry changes from a distorted square pyramid to a distorted trigonal bipyramid. The two copper ions in 1-3 are antiferromagnetically coupled with 2J = -714 (1), -19.9 (2), -277 cm-1 (3). The results clearly demonstrate that protonation/deprotonation causes a change in coordination geometry, which in turn drastically affects magnetic exchange interactions.

AB - The reaction of a tripodal ligand (H2L = N,N-bis(2-hydroxybenzyl)-N′,N′-dimethylethylenediamine) with (Cu(NO3)2·3H2O and Cu(ClO4)2·6H2O in methanol yielded [Cu2(HL)2](NO3)2·H 2O (1) and [Cu2(HL)2](ClO4)2 (1′), respectively. When H2L was allowed to react with CuSO4·5H2O in the presence of triethylamine (1:1:2) in methanol, the neutral dicopper(II,II) complex [Cu2(L)2] (2) was obtained. The monopositive species [Cu2(L)(HL)]ClO4·CH3OH·H 2O (3) crystallized on mixing 1′ and 2(1:1) in methanol-dichloromethane. The crystal structures of 1,2, and 3 were determined by X-ray crystallography. All of the complexes consist of a discrete dinuclear molecule with bis(μ-phenoxide)-bridges. The tripodal ligand functions as a tetradentate ligand and one of the phenolic oxygen atoms serves as a bridging ligand. Protonation/deprotonation takes place at the terminal phenol moiety and as the phenol group is deprotonated the coordination geometry changes from a distorted square pyramid to a distorted trigonal bipyramid. The two copper ions in 1-3 are antiferromagnetically coupled with 2J = -714 (1), -19.9 (2), -277 cm-1 (3). The results clearly demonstrate that protonation/deprotonation causes a change in coordination geometry, which in turn drastically affects magnetic exchange interactions.

UR - http://www.scopus.com/inward/record.url?scp=0035981329&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0035981329&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:0035981329

SN - 1477-9226

SP - 3737

EP - 3742

JO - Dalton Transactions

JF - Dalton Transactions

IS - 19

ER -