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Thermal Decomposition Mechanism for Ethanethiol
- Source :
- The journal of physical chemistry. A. 121(26)
- Publication Year :
- 2017
-
Abstract
- The thermal decomposition of ethanethiol was studied using a 1 mm × 2 cm pulsed silicon carbide microtubular reactor, CH3CH2SH + Δ → Products. Unlike previous studies these experiments were able to identify the initial ethanethiol decomposition products. Ethanethiol was entrained in either an Ar or a He carrier gas, passed through a heated (300–1700 K) SiC microtubular reactor (roughly ≤100 μs residence time) and exited into a vacuum chamber. Within one reactor diameter the gas cools to less than 50 K rotationally, and all reactions cease. The resultant molecular beam was probed by photoionization mass spectroscopy and IR spectroscopy. Ethanethiol was found to undergo unimolecular decomposition by three pathways: CH3CH2SH → (1) CH3CH2 + SH, (2) CH3 + H2C═S, and (3) H2C═CH2 + H2S. The experimental findings are in good agreement with electronic structure calculations.
- Subjects :
- 010304 chemical physics
Ethanethiol
Thermal decomposition
Analytical chemistry
Infrared spectroscopy
Photoionization
010402 general chemistry
Mass spectrometry
01 natural sciences
Decomposition
Article
0104 chemical sciences
chemistry.chemical_compound
chemistry
0103 physical sciences
Vacuum chamber
Physical and Theoretical Chemistry
Molecular beam
Subjects
Details
- ISSN :
- 15205215
- Volume :
- 121
- Issue :
- 26
- Database :
- OpenAIRE
- Journal :
- The journal of physical chemistry. A
- Accession number :
- edsair.doi.dedup.....2d447f2b6b6db8eb67a43d530d4f808b