UV‐Laser Photochemistry: Trapping of the Norrish Type II Triplet Diradical 1‐Hydroxy‐4‐methyl‐1‐phenyl‐1,4‐pentanediyl with Molecular Oxygen | Zendy

Adam Waldemar | Zendy; Grabowski Sven | Zendy; Wilson R. Marshall | Zendy

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UV‐Laser Photochemistry: Trapping of the Norrish Type II Triplet Diradical 1‐Hydroxy‐4‐methyl‐1‐phenyl‐1,4‐pentanediyl with Molecular Oxygen

Author(s) -

Adam Waldemar,

Grabowski Sven,

Wilson R. Marshall

Publication year - 1989

Publication title -

chemische berichte

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.667

H-Index - 136

eISSN - 1099-0682

pISSN - 0009-2940

DOI - 10.1002/cber.19891220326

Subject(s) - chemistry , diradical , flash photolysis , photochemistry , photodissociation , methanol , trapping , tautomer , triplet state , oxygen , radical , ring (chemistry) , medicinal chemistry , molecule , reaction rate constant , kinetics , organic chemistry , excited state , singlet state , ecology , biology , physics , quantum mechanics , nuclear physics

The triplet lifetime ( 3 ι = 131 ± 5 ns) of diradical 2 , produced in the laser photolysis (334 nm) of 4‐methyl‐1‐phenyl‐1‐pentanone ( 1 ) in methanol, was determined by dioxygen trapping. This lifetime agrees well with the value determined by laser flash photolysis ( 3 ι = 97 ns), thereby establishing the reliability of the trapping technique. The trapping product was prepared by independent synthesis and characterized as 3‐hydroxy‐1,2‐dioxolane 9 , the ring tautomer of hydroperoxide 6 .

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