Chloroethylene photochemical lasers: Vibrational energy content of the HCl molecular elimination products

摘要

Chemical laser techniques have been used to determine relative photochemical product yields and HCldagger;(vprime;le;4) photoelimination product vibronic state distributions resulting from chloroethylene (CH2dblbnd;CHCl, CH2dblbnd;CDCl, CH2dblbnd;CCl2,cishyphen; andtranshyphen;CHCldblbnd;CHCl, and CHCldblbnd;CCl2) photolyses at lgr; ge; 1550 Aring;. The observed highly nonstatistical product vibronic state distributions are successfully matched by a bootstrap reaction dynamics model which considers sudden structural distortion and intramolecular relaxation of HCl as it separates from acetylene or haloacetylene products. Chloroethylene vacuum ultraviolet absorption spectra (lgr;ge; 1400 Aring;) are also reported. All available spectroscopic, photochemical, and product energy partitioning data are used to formulate a statehyphen;tohyphen;state photochemical reaction mechanism for HCl photoelimination from the chloroethylenes.