Photodissociation dynamics of the methyl perthiyl radical at 248 nm via photofragment translational spectroscopy

摘要

Photofragment translational spectroscopy was used to study the photodissociation of the methyl perthiyl radical CH_3SS at 248 nm. The radical was produced by flash pyrolysis of dimethyl disulfide (CH _3SSCH_3). Two channels were observed: CH_3 + S_2 and CH_2S + SH. Photofragment translational energy distributions indicate that CH_3 + S_2 results from C-S bond fission on the ground state surface. The CH_2S + SH channel can proceed through isomerization to CH_2SSH on the ground state surface but also may involve production of electronically excited CH_2S.