Photodissociation of molecular beams of halogenated hydrocarbons at 193 nm |
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Authors: | Masahiro Kawasaki Kazuo Kasatani Hiroyasu Sato Hisanori Shinohara Nobuyuki Nishi |
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Affiliation: | Chemistry Department of Resources, Faculty of Engineering, Mi''e University, Tsu 514, Japan;Institute for Molecular Science, Okazaki 444, Japan |
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Abstract: | Molecular beams of halogenated hydrocarbons containing chlorine and bromine atoms were photodissociated using an excimer laser at 193 nm. Molecules photodissociated were HCCBr, HCCCH2Br, HCCCH2Cl, CH3Cl, C2H5Cl and i-C3H7Cl. The time-of-flight distributions of the photofragments were measured in order to study the primary processes and the dissociation dynamics. Generalizations consistent with the data are that atomic products (RX → R + X) result from direct dissociation of the CX repulsive singlet state, molecular elimination (RX → R′ + HX) is a result of a crossover to the ground state and triplet states are involved in the photodissociation of alkyne compounds. |
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