521281-91-4Relevant articles and documents
Spin selectivity in the oxygenation of singlet phenylhalocarbenes with oxygen
Makihara, Taiki,Nojima, Takayuki,Ishiguro, Katsuya,Sawaki, Yasuhiko
, p. 865 - 868 (2003)
Singlet phenylhalocarbenes are shown to react with triplet oxygen and the apparent spin-forbidden oxygenation rates are strongly dependent on substituents, i.e. in the decreasing order of Br>Cl?F for halogen and of p-NO2>H?p-MeO for p-substituents. These results suggest the oxygenation of triplet halocarbene equilibrated with ground-state singlet, resulting in the first estimation of energy difference between the singlet and triplet states.
