77350-49-3Relevant academic research and scientific papers
Photolysis of 1,1-Dichloro-2,2-diarylethenes in the Presence of Oxygen. Formation of Highly Unstable Dioxetanes
Petersen, Bjarne W.,Pedersen, Christian L.
, p. 523 - 528 (2007/10/02)
The photolysis of 1,1-dichloro-2,2-bis(4-methoxyphenyl)ethene, 1,1-dichloro-2,2-bis(4-tolyl)ethene and 1,1-dichloro-2,2-diphenylethene in the presence of oxygen has been investigated by flash photolysis and by steady-state photolysis.These experiments showed that the corresponding benzophenones were formed as primary photoproducts.After vapour phase photolysis, carbonyl chloride was identified by mass spectrometry.It is suggested that these products are formed by ring cleavage of unstable dioxetanes.By flash photolysis short-lived intermediates (k 150 - 300 s-1) were detected.On the basis of the UV absorptions, the chemical properties and the Arrhenius activation parameters, these intermediates are assigned as 1,2-dioxetanes.
