86177-64-2Relevant academic research and scientific papers
Polar Effect in the Reaction of Photoenol-type Diradical with Molecular Oxygen
Ito, Yoshikatsu,Nishimura, Hiroaki,Shimizu, Hiroshi,Matsuura, Teruo
, p. 1110 - 1111 (1983)
Measurement of product quantum yields indicated that reactions of molecular oxygen with diradicals photogenerated from 2,4,6-tri-isopropylbenzophenones (3a-e) were accelerated by the presence of both electron-donating (OMe and Me) and electron-withdrawing (Cl and CF3) substituents, this acceleration probably resulted from the zwitterionic nature of the diradicals.
SPIN INVERSION IN THE 1,4-DIRADICAL DERIVED FROM 2,4,6-TRIISOPROPYLBENZOPHENONE: IMPORTANCE OF LONE-PAIR ORBITAL ROTATION.
Ito,Matsuura
, p. 5237 - 5244 (2007/10/02)
,6-Diisopropyl-2,2-dimethyl-1-phenyl-1,2-dihydrobenzocyclobuten-1-ol (2) was submitted to direct (254 nm) and sensitized photolysis and thermolysis in the absence or presence of oxygen. Direct photolysis (313 nm) of 2,4,6-triisopropylbenzophenone (1) was also performed in the absence or presence of oxygen. Interconversion between 1 and 2 and production of 1,3-diisopropyl-10,10-dimethylanthrone (3) and ,4-dihydro-1-hydroxy-6,8-diisopropyl-4,4-dimethyl-1-phenyl-2,3-benzo dioxin (4) happened in various quantum yields depending upon the reaction conditons. It is concluded that DR, which is generated from the direct photolysis of 1, is spin protected and its lifetime is determined by the rate of intersystem crossing.
