Nitroxide-substituted nitronyl nitroxide and iminonitroxide.
We report on the highly compact nitroxide-substituted nitronyl nitroxide 1 and iminonitroxide 2; they have isoelectronic structures with trimethylenemethane. These diradicals are stable under aerated conditions at room temperature and have large positive exchange interactions: J/k(B) = +390 K (H = -2JS(1)(/)(2)·S(1/2)) for 1 and J/k(B) ≈ +550 K for 2.
Suzuki
Shuichi
S
Department of Chemistry, Graduate School of Science, Osaka City University, Sugimoto Sumiyoshi-ku, Osaka 558-8585, Japan.
Furui
Takanori
T
Kuratsu
Masato
M
Kozaki
Masatoshi
M
Shiomi
Daisuke
D
Sato
Kazunobu
K
Takui
Takeji
T
Okada
Keiji
K