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- W2030822672 abstract "Laser flash photolysis (308 nm) of carbomethoxy-2-naphththyldiazomethane in deoxygenated Freon-113 (CF2ClCFCl2) solution containing tetrahydrofuran (THF) produces a transient spectrum with a sharp absorption maximum at 330 nm and a shoulder at 375 nm. The observed rate constant of formation of transient absorption is the same at 330 and 400 nm. The transient spectrum is the same 100 ns, 1 μs, and 10 μs after the laser pulse at ambient temperature and is attributable to a single carrier. The transient shows little decay over 10 μs in the presence and absence of oxygen. Similar results were obtained at −60° C. This pattern of observations is not consistent with assigning the transient to triplet carbomethoxy-2-naphthylcarbene or its related radical. The rate constant of formation of the transient, kTHF, is first order in the concentration of THF; thus, the transient is attributed to a carbene−ether ylide. To our knowledge, this is the first direct observation of a carbene-ether ylide. An Arrhenius plot of kTHF is nonlinear due to a change in mechanism of the reaction of the carbene with THF or to reversion of the ylide to carbene and THF at elevated temperatures." @default.
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- W2030822672 date "2001-03-23" @default.
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- W2030822672 title "A Laser Flash Photolysis Study of a Carbene−Ether Ylide" @default.
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- W2030822672 doi "https://doi.org/10.1021/jp001726k" @default.
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