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• W2031161548 abstract "The photochemistry and photodissociation dynamics of the propargyl radical, C3H3, upon UV excitation is investigated by time- and frequency-resolved detection of hydrogen atoms. From a statistical analysis of the data, we conclude that formation of cyclopropenylidene, c-C3H2, is the dominant reaction channel. Around 22% of the excess energy is released into the translational degrees of freedom. By varying the excitation energy between 265 and 240 nm, microcanonical rates for the loss of a hydrogen atom can be obtained as a function of excess energy. The experimental rates, on the order of several 106 s−1, are in good agreement with Rice–Ramsperger–Kassel–Marcus (RRKM) calculations, provided a scaling factor is used for the vibrational frequencies, to account for the effects of anharmonicity. The interpretation is confirmed in experiments using monodeuterated propargyl radicals, H2CCCD, indicating a mechanism that proceeds via an initial [1,2] H-shift, followed by cyclization." @default.
• W2031161548 created "2016-06-24" @default.
• W2031161548 creator A5025877100 @default.
• W2031161548 creator A5027735051 @default.
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• W2031161548 date "1999-08-22" @default.
• W2031161548 modified "2023-10-16" @default.
• W2031161548 title "Photodissociation dynamics of the propargyl radical" @default.
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• W2031161548 doi "https://doi.org/10.1063/1.479629" @default.
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