Interrupted σ-bonds in organic materials with colligative magnetic properties

Sei Hum Jang; James E. Jackson; Ruth Ann Bertsch; Bart Kahr

doi:10.1080/10587259208025828

Interrupted σ-bonds in organic materials with colligative magnetic properties

Sei Hum Jang, James E. Jackson, Ruth Ann Bertsch, Bart Kahr

Chemistry

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

Abstract

Solutions of tris(2,6-dimethoxyphenyl)methyl radical (1) and lithium salts form solids showing unusual magnetic behavior. The propeller-shaped radicals, with their tripods of nucleophilic oxygens, are preorganized polydentate ligands. By coordination with small alkali metal cations the radicals may stack, enforcing spin-spin interactions in extended chains of paramagnets. Ab initio calculations on a linear H₃C·Li⁺·CH₃ model shows that high-spin (ferromagnetic) electron coupling is favored for a wide range of radical-Li⁺ distances.

Original language	English (US)
Pages (from-to)	289-303
Number of pages	15
Journal	Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals
Volume	211
Issue number	1
DOIs	https://doi.org/10.1080/10587259208025828
State	Published - Jan 1 1992

Keywords

cryptand
diradical
molecular magnet
organic ferromagnet
triarylmethyl radical
triplet state

ASJC Scopus subject areas

Condensed Matter Physics

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10.1080/10587259208025828

Cite this

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title = "Interrupted σ-bonds in organic materials with colligative magnetic properties",

abstract = "Solutions of tris(2,6-dimethoxyphenyl)methyl radical (1) and lithium salts form solids showing unusual magnetic behavior. The propeller-shaped radicals, with their tripods of nucleophilic oxygens, are preorganized polydentate ligands. By coordination with small alkali metal cations the radicals may stack, enforcing spin-spin interactions in extended chains of paramagnets. Ab initio calculations on a linear H3C·Li+·CH3 model shows that high-spin (ferromagnetic) electron coupling is favored for a wide range of radical-Li+ distances.",

keywords = "cryptand, diradical, molecular magnet, organic ferromagnet, triarylmethyl radical, triplet state",

author = "Jang, {Sei Hum} and Jackson, {James E.} and Bertsch, {Ruth Ann} and Bart Kahr",

note = "Funding Information: This work was supported by the Center for Materials Research (Grant #91-0285), and Purdue University, Department of Chemistry. We thank Kurt Mislow (NSF, CHE-8510067) for supponof preliminary work. We are grateful to John Blount for the crysrd structure of 4.",

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doi = "10.1080/10587259208025828",

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pages = "289--303",

journal = "Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals",

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T1 - Interrupted σ-bonds in organic materials with colligative magnetic properties

AU - Jang, Sei Hum

AU - Jackson, James E.

AU - Bertsch, Ruth Ann

AU - Kahr, Bart

N1 - Funding Information: This work was supported by the Center for Materials Research (Grant #91-0285), and Purdue University, Department of Chemistry. We thank Kurt Mislow (NSF, CHE-8510067) for supponof preliminary work. We are grateful to John Blount for the crysrd structure of 4.

PY - 1992/1/1

Y1 - 1992/1/1

N2 - Solutions of tris(2,6-dimethoxyphenyl)methyl radical (1) and lithium salts form solids showing unusual magnetic behavior. The propeller-shaped radicals, with their tripods of nucleophilic oxygens, are preorganized polydentate ligands. By coordination with small alkali metal cations the radicals may stack, enforcing spin-spin interactions in extended chains of paramagnets. Ab initio calculations on a linear H3C·Li+·CH3 model shows that high-spin (ferromagnetic) electron coupling is favored for a wide range of radical-Li+ distances.

AB - Solutions of tris(2,6-dimethoxyphenyl)methyl radical (1) and lithium salts form solids showing unusual magnetic behavior. The propeller-shaped radicals, with their tripods of nucleophilic oxygens, are preorganized polydentate ligands. By coordination with small alkali metal cations the radicals may stack, enforcing spin-spin interactions in extended chains of paramagnets. Ab initio calculations on a linear H3C·Li+·CH3 model shows that high-spin (ferromagnetic) electron coupling is favored for a wide range of radical-Li+ distances.

KW - cryptand

KW - diradical

KW - molecular magnet

KW - organic ferromagnet

KW - triarylmethyl radical

KW - triplet state

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JO - Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals

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Interrupted σ-bonds in organic materials with colligative magnetic properties

Abstract

Keywords

ASJC Scopus subject areas

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