54191-78-5Relevant academic research and scientific papers
PHOTOLYSIS AND GAS PHASE PYROLYSIS OF 1,2,3-BENZOSELENADIAZOLE - MATRIX ISOLATION OF BENZOSELENIRENE
Schulz, Reinhard,Schweig, Armin
, p. 2337 - 2340 (1984)
Based on comparative studies on 1,2,3-benzothiazole benzoselenirene is identified as an intermediate in the low temperature photolysis and gas phase pyrolysis of 1,2,3-benzoselenadiazole by IR spectroscopy.
Flash vacuum thermolysis of 4H-3,1-benzoxathiin-4-thione: UV-photoelectron spectroscopy characterization and quantum chemistry studies
Drewnowski, Tomasz,Chrostowska, Anna,Lesniak, Stanislaw,Dargelos, Alain,Khayar, Said
body text, p. 766 - 781 (2009/02/07)
The mechanism of the reaction of 4H-3,1-benzoxathiin-4-thione (3) under flash vacuum thermolysis conditions has been studied by UV-photoelectron spectra. It was shown that in the first step of the reaction at 400° 3 underwent the Schoenberg - Newman - Kwart rearrangement to give 4H-1,3-benzodithiin-4-one (6). Increasing of the temperature to 650° resulted in the elimination of thioformaldehyde and the formation of benzothiet-2-one (1). Subsequent elevation of the temperature prompted presumably the ring opening of 1 to (6-thioxocyclohexa-2,4-dien-1-ylidene) methanone (7) (at 680°), which at 700° eliminated CO and underwent a Wolff-type ring contraction to give (cyclopenta-2,4-dien-1-ylidene)methanethione (2). UV-Photoelectron spectra were recorded at different steps of the reaction and analyzed considering the theoretical evaluation of ionization potentials.
Gas Phase Reactions, 24. The Thermal Generation of Thiocarbonyl Compounds
Bock, Hans,Hirabayashi, Takakuni,Mohmand, Shamsher
, p. 492 - 503 (2007/10/02)
Thiocarbonyl derivatives R1R2C=S with R1, R2 = H, CH3, C6H5 can be generated thermally in the gas phase from a variety of precursors.Especially advantageous are the cleavage of propene from allyl sulfides or, for their preparation in pure form, the pyrolysis of dithietane or trithiolane derivatives.Photoelectron spectroscopy proves to be well-suited for gas analysis in the flow tube used, for the optimization of the decomposition conditions, and via assignment of the observed ionization patterns for the characterization of the thioaldehydes and thioketones prepared.
