2D and 3D Cu(hfac)<sub>2</sub> complexes with nitronyl nitroxide biradicals

Abstract

Reactions between Cu(hfac)₂ and nitronyl nitroxide biradicals 1,4-bis[4-(4,4,5,5-tetramethyl-3-oxide-1-oxyl-4,5-dihydro-1H-imidazol-2-yl) pyrazol-1-yl]butane (L⁴) and 1,8-bis[4-(4,4,5,5-tetramethyl-3-oxide- 1-oxyl-4,5-dihydro-1H-imidazol-2-yl)pyrazol-1-yl]octane (L⁸) gave respectively a framework compound [Cu(hfac)₂]₂L ⁴ and a layered polymer compound [Cu(hfac)₂] ₂L⁸. The framework of [Cu(hfac)₂] ₂L⁴ consists of 66-membered condensed metallocycles. Inside the framework, the structure has macrohelixes (pitch ∼25 Å) extending along the [001] crystallographic direction. All the helixes have the same direction of winding; the crystals, therefore, are optically active, the structure corresponding either to P-isomer (P4₁2₁2) or to M-isomer (P4₃2₁2). The long distances between the Cu atoms and the O atoms of the coordinated >N-O groups (Cu-O 2.351-2.467 Å) are responsible for ferromagnetic exchange interactions in Cu ²⁺-O-^.N< and >N-^.O-Cu²⁺-O- ^.N< exchange clusters.

Original language	English
Pages (from-to)	3671-3678
Number of pages	8
Journal	Inorganic Chemistry
Volume	45
Issue number	9
DOIs	https://doi.org/10.1021/ic060132e
Publication status	Published - 1 May 2006
Externally published	Yes

ASJC Scopus subject areas

Physical and Theoretical Chemistry
Inorganic Chemistry

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10.1021/ic060132e

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@article{7a6cd5f87a584e1e830c0fed017b9b9d,

title = "2D and 3D Cu(hfac)2 complexes with nitronyl nitroxide biradicals",

abstract = "Reactions between Cu(hfac)2 and nitronyl nitroxide biradicals 1,4-bis[4-(4,4,5,5-tetramethyl-3-oxide-1-oxyl-4,5-dihydro-1H-imidazol-2-yl) pyrazol-1-yl]butane (L4) and 1,8-bis[4-(4,4,5,5-tetramethyl-3-oxide- 1-oxyl-4,5-dihydro-1H-imidazol-2-yl)pyrazol-1-yl]octane (L8) gave respectively a framework compound [Cu(hfac)2]2L 4 and a layered polymer compound [Cu(hfac)2] 2L8. The framework of [Cu(hfac)2] 2L4 consists of 66-membered condensed metallocycles. Inside the framework, the structure has macrohelixes (pitch ∼25 {\AA}) extending along the [001] crystallographic direction. All the helixes have the same direction of winding; the crystals, therefore, are optically active, the structure corresponding either to P-isomer (P41212) or to M-isomer (P43212). The long distances between the Cu atoms and the O atoms of the coordinated >N-O groups (Cu-O 2.351-2.467 {\AA}) are responsible for ferromagnetic exchange interactions in Cu 2+-O-.N< and >N-.O-Cu2+-O- .N< exchange clusters.",

author = "Eugene Tretyakov and Sergei Fokin and Galina Romanenko and Vladimir Ikorskii and Sergei Vasilevsky and Victor Ovcharenko",

year = "2006",

month = may,

day = "1",

doi = "10.1021/ic060132e",

language = "English",

volume = "45",

pages = "3671--3678",

journal = "Inorganic Chemistry",

issn = "0020-1669",

publisher = "American Chemical Society",

number = "9",

}

TY - JOUR

T1 - 2D and 3D Cu(hfac)2 complexes with nitronyl nitroxide biradicals

AU - Tretyakov, Eugene

AU - Fokin, Sergei

AU - Romanenko, Galina

AU - Ikorskii, Vladimir

AU - Vasilevsky, Sergei

AU - Ovcharenko, Victor

PY - 2006/5/1

Y1 - 2006/5/1

N2 - Reactions between Cu(hfac)2 and nitronyl nitroxide biradicals 1,4-bis[4-(4,4,5,5-tetramethyl-3-oxide-1-oxyl-4,5-dihydro-1H-imidazol-2-yl) pyrazol-1-yl]butane (L4) and 1,8-bis[4-(4,4,5,5-tetramethyl-3-oxide- 1-oxyl-4,5-dihydro-1H-imidazol-2-yl)pyrazol-1-yl]octane (L8) gave respectively a framework compound [Cu(hfac)2]2L 4 and a layered polymer compound [Cu(hfac)2] 2L8. The framework of [Cu(hfac)2] 2L4 consists of 66-membered condensed metallocycles. Inside the framework, the structure has macrohelixes (pitch ∼25 Å) extending along the [001] crystallographic direction. All the helixes have the same direction of winding; the crystals, therefore, are optically active, the structure corresponding either to P-isomer (P41212) or to M-isomer (P43212). The long distances between the Cu atoms and the O atoms of the coordinated >N-O groups (Cu-O 2.351-2.467 Å) are responsible for ferromagnetic exchange interactions in Cu 2+-O-.N< and >N-.O-Cu2+-O- .N< exchange clusters.

AB - Reactions between Cu(hfac)2 and nitronyl nitroxide biradicals 1,4-bis[4-(4,4,5,5-tetramethyl-3-oxide-1-oxyl-4,5-dihydro-1H-imidazol-2-yl) pyrazol-1-yl]butane (L4) and 1,8-bis[4-(4,4,5,5-tetramethyl-3-oxide- 1-oxyl-4,5-dihydro-1H-imidazol-2-yl)pyrazol-1-yl]octane (L8) gave respectively a framework compound [Cu(hfac)2]2L 4 and a layered polymer compound [Cu(hfac)2] 2L8. The framework of [Cu(hfac)2] 2L4 consists of 66-membered condensed metallocycles. Inside the framework, the structure has macrohelixes (pitch ∼25 Å) extending along the [001] crystallographic direction. All the helixes have the same direction of winding; the crystals, therefore, are optically active, the structure corresponding either to P-isomer (P41212) or to M-isomer (P43212). The long distances between the Cu atoms and the O atoms of the coordinated >N-O groups (Cu-O 2.351-2.467 Å) are responsible for ferromagnetic exchange interactions in Cu 2+-O-.N< and >N-.O-Cu2+-O- .N< exchange clusters.

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DO - 10.1021/ic060132e

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AN - SCOPUS:33646427741

VL - 45

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EP - 3678

JO - Inorganic Chemistry

JF - Inorganic Chemistry

SN - 0020-1669

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