Flash vacuum thermolysis of 4H-3,1-benzodithiin-4-thione: UV-photoelectron spectroscopy characterization of benzothiet-2-thione and quantum chemistry studies

摘要

Flash vacuum thermolysis of 4H-1,3-benzodithiin-4-thione (2) resulted in the formation of phenanthro[9,10-c]-1,2-dithiete (3) and 3H-1,2-benzodithiole-3- thione (4). The mechanism of this reaction, including the formation of benzothiet-2-thione (5′) as an intermediate, has been postulated. UV photoelectron spectra of 2 at variable temperature flash vacuum thermolysis have been recorded and analyzed considering the theoretical evaluation of ionisation potentials.