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.
Department of Chemistry, Graduate School of Science, Osaka City University, Sugimoto Sumiyoshi-ku, Osaka 558-8585, Japan.
Shuichi
S
Suzuki
Takanori
T
Furui
Masato
M
Kuratsu
Masatoshi
M
Kozaki
Daisuke
D
Shiomi
Kazunobu
K
Sato
Takeji
T
Takui
Keiji
K
Okada