Surface problems in kinetic studies of the gas-phase pyrolyses of alkyl halides. Part I. Reaction-vessel coatings of pyrolytic carbon

1966 ◽  
pp. 713 ◽  
Author(s):  
M. R. Bridge ◽  
J. L. Holmes
Keyword(s):  
Gas Phase ◽  
Kinetic Studies ◽  
Pyrolytic Carbon ◽  
Reaction Vessel ◽  
Alkyl Halides

The thermal decompositions of carbamates. I. Ethyl N-Methyl-N-phenylcarbamate

1971 ◽  
Vol 24 (12) ◽  
pp. 2541 ◽  
Author(s):  
NJ Daly ◽  
F Ziolkowski
Keyword(s):  
Carbon Dioxide ◽  
Gas Phase ◽  
Rate Constants ◽  
Volume Ratio ◽  
Reaction Vessel ◽  
First Order ◽  
Order Rate

Ethyl N-methyl-N-phenylcarbamate decomposes in the gas phase over the range 329-380� to give N-methylaniline, carbon dioxide, and ethylene. The reaction is quantitative, and is first order in the carbamate. First-order rate constants are described by the equation ������������������� k1 = 1012.44 exp(-45,380/RT) (s-1) and are unaffected by the addition of cyclohexene or by increase in the surface to volume ratio of the reaction vessel. The reaction is considered to be unimolecular and likely to proceed by means of a mechanism of the type represented by the pyrolyses of acetates, xanthates, and carbonates.

A PANORAMIC MASS SPECTROSCOPE FOR KINETIC STUDIES

1955 ◽  
Vol 33 (2) ◽  
pp. 74-95 ◽  
Author(s):  
Edouard G. Leger
Keyword(s):  
Gas Phase ◽  
Diethyl Ether ◽  
Motion Picture ◽  
Chemical Species ◽  
Kinetic Studies ◽  
Mass Spectrometric ◽  
Gas Phase Reactions ◽  
Electron Multiplier ◽  
Cool Flames ◽  
Cathode Ray Tube

A mass spectroscope capable of recording the trend of many chemical species in rapid gas-phase reactions is described. The instrument represents a departure from analytical mass spectrometric practice by using a molecular streaming source, rapid electric scanning, an electron multiplier ion detector amplifier, and a cathode ray tube display. A 40 peak spectrum can be scanned in five milliseconds and recorded by a motion picture camera. A few results obtained with this instrument in the study of diethyl ether cool flames are given.

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