Gas-phase Thermolyses. Part 3. Gas-phase Thermolysis of Silylated Thionocarboxylic Acid Derivatives: a Route to Thioketens?
The unimolecular gas-phase thermolytic decomposition of three silylated thionocarboxylic acid derivatives (2b), (3), and (8) have been studied by the flash vacuum thermolysis-field ionization mass spectrometry technique in the temperature range from 783 to 1404 K in order to elucidate its possible applicability as a route to thioketens.Only very minor amounts of the expected thioketens were found, whereas the corresponding ketens were obtained as the major products.A possible mechanism for keten formation is discussed.