Synthesis, crystal structure and magnetic properties of o-carboranyl nitronyl nitroxide biradical: a prototype of a three-dimensional analogue of o-benzoquinodimethane.
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 (theta = -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.
Iwahori
Fumiyasu
F
Department of Chemistry, The 21st Century COE Program, Aoyama Gakuin University, 5-10-1 Fuchinobe, Sagamihara, Kanagawa 229-8558, Japan.
Nishikawa
Yoshikazu
Y
Mori
Ken-ichiro
K
Yamashita
Masahiro
M
Abe
Jiro
J