Issue 3, 2006
From the journal:

Dalton Transactions

Synthesis, crystal structure and magnetic properties of o-carboranyl nitronyl nitroxide biradical: a prototype of a three-dimensional analogue of o-benzoquinodimethane

Fumiyasu Iwahori,ab   Yoshikazu Nishikawa,c   Ken-ichiro Mori,c   Masahiro Yamashitabd  and  Jiro Abe*a  

* Corresponding authors

a Department of Chemistry, The 21st Century COE Program, Aoyama Gakuin University, 5-10-1 Fuchinobe, Sagamihara, Kanagawa, Japan
E-mail: jiro_abe@chem.aoyama.ac.jp
Fax: +81 42 759 6225
Tel: +81 42 759 6225

b CREST, Japan Science and Technology Agency, Kawaguchi Center Building, 4-1-8 Honcho, Kawaguchi, Saitama, Japan

c Department of Applied Chemistry, Graduate School of Engineering, Tokyo Metropolitan University, 1-1 Minami-Osawa, Hachioji, Tokyo, Japan

d Department of Chemistry, Graduate School of Science, Tohoku University, 6-3 Aramaki-Aza-Aoba, Aoba-ku, Sendai, Miyagi, Japan

Abstract

We have designed and synthesised a new carborane derivative containing two nitronyl nitroxides. This molecule can be considered as a prototype of a three-dimensional analogue of o-benzoquinodimethane. The magnetic susceptibility of a crystalline sample revealed that this biradical possesses a weak antiferromagnetic interaction (θ = −1.05(4) K) and an ESR study in frozen matrix in the 5.4–104 K range gave an intramolecular antiferromagnetic interaction of −27(2) K. The synthesis, physical properties and DFT calculation result are also reported.

Graphical abstract: Synthesis, crystal structure and magnetic properties of o-carboranyl nitronyl nitroxide biradical: a prototype of a three-dimensional analogue of o-benzoquinodimethane

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Article information

DOI
https://doi.org/10.1039/B511579E
Article type
Paper
Submitted
15 Aug 2005
Accepted
20 Oct 2005
First published
14 Nov 2005

Dalton Trans., 2006, 473-477

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Synthesis, crystal structure and magnetic properties of o-carboranyl nitronyl nitroxide biradical: a prototype of a three-dimensional analogue of o-benzoquinodimethane

F. Iwahori, Y. Nishikawa, K. Mori, M. Yamashita and J. Abe, Dalton Trans., 2006, 473 DOI: 10.1039/B511579E

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