ESR of the Cationic Triradical of 1,3,5-Tris(diphenylamino)benzene

Kazunari Yoshizawa; Akihisa Chano; Akihiro Ito; Kazuyoshi Tanaka; Tokio Yamabe; Hideo Fujita; Jim Yamauchi; Motoo Shiro

doi:10.1021/ja00041a013

ESR of the Cationic Triradical of 1,3,5-Tris(diphenylamino)benzene

Kazunari Yoshizawa, Akihisa Chano, Akihiro Ito, Kazuyoshi Tanaka, Tokio Yamabe, Hideo Fujita, Jim Yamauchi, Motoo Shiro

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

123 Citations (Scopus)

Abstract

The ESR spectrum of the cationic triradical of 1,3,5-tris(diphenylamino)benzene (TDAB) is discussed. The tricationic state of TDAB was observed by means of cyclic voltammetry. The orange cationic triradical was prepared by oxidation of TDAB with trifluoroacetic anhydride in the presence of tetra-n-butylammonium tetrafluoroborate in CH₂Cl₂. The ESR spectrum of the randomly oriented radicals in the CH₂Cl₂ glass agrees well with the theoretical prediction of a quartet (S = 3/2) spin state with a zero-field splitting parameter D′ of 13.1 G (0.0012 cm^-1). This is the first observation of a high-spin state of a cationic radical.

Original language	English
Pages (from-to)	5994-5998
Number of pages	5
Journal	Journal of the American Chemical Society
Volume	114
Issue number	15
DOIs	https://doi.org/10.1021/ja00041a013
Publication status	Published - Jul 1 1992
Externally published	Yes

All Science Journal Classification (ASJC) codes

Catalysis
Chemistry(all)
Biochemistry
Colloid and Surface Chemistry

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10.1021/ja00041a013

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title = "ESR of the Cationic Triradical of 1,3,5-Tris(diphenylamino)benzene",

abstract = "The ESR spectrum of the cationic triradical of 1,3,5-tris(diphenylamino)benzene (TDAB) is discussed. The tricationic state of TDAB was observed by means of cyclic voltammetry. The orange cationic triradical was prepared by oxidation of TDAB with trifluoroacetic anhydride in the presence of tetra-n-butylammonium tetrafluoroborate in CH2Cl2. The ESR spectrum of the randomly oriented radicals in the CH2Cl2 glass agrees well with the theoretical prediction of a quartet (S = 3/2) spin state with a zero-field splitting parameter D′ of 13.1 G (0.0012 cm-1). This is the first observation of a high-spin state of a cationic radical.",

author = "Kazunari Yoshizawa and Akihisa Chano and Akihiro Ito and Kazuyoshi Tanaka and Tokio Yamabe and Hideo Fujita and Jim Yamauchi and Motoo Shiro",

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T1 - ESR of the Cationic Triradical of 1,3,5-Tris(diphenylamino)benzene

AU - Yoshizawa, Kazunari

AU - Chano, Akihisa

AU - Ito, Akihiro

AU - Tanaka, Kazuyoshi

AU - Yamabe, Tokio

AU - Fujita, Hideo

AU - Yamauchi, Jim

AU - Shiro, Motoo

PY - 1992/7/1

Y1 - 1992/7/1

N2 - The ESR spectrum of the cationic triradical of 1,3,5-tris(diphenylamino)benzene (TDAB) is discussed. The tricationic state of TDAB was observed by means of cyclic voltammetry. The orange cationic triradical was prepared by oxidation of TDAB with trifluoroacetic anhydride in the presence of tetra-n-butylammonium tetrafluoroborate in CH2Cl2. The ESR spectrum of the randomly oriented radicals in the CH2Cl2 glass agrees well with the theoretical prediction of a quartet (S = 3/2) spin state with a zero-field splitting parameter D′ of 13.1 G (0.0012 cm-1). This is the first observation of a high-spin state of a cationic radical.

AB - The ESR spectrum of the cationic triradical of 1,3,5-tris(diphenylamino)benzene (TDAB) is discussed. The tricationic state of TDAB was observed by means of cyclic voltammetry. The orange cationic triradical was prepared by oxidation of TDAB with trifluoroacetic anhydride in the presence of tetra-n-butylammonium tetrafluoroborate in CH2Cl2. The ESR spectrum of the randomly oriented radicals in the CH2Cl2 glass agrees well with the theoretical prediction of a quartet (S = 3/2) spin state with a zero-field splitting parameter D′ of 13.1 G (0.0012 cm-1). This is the first observation of a high-spin state of a cationic radical.

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JF - Journal of the American Chemical Society

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ER -

ESR of the Cationic Triradical of 1,3,5-Tris(diphenylamino)benzene

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