Determination of the gas-phase reactivity of hydroxyl with chlorinated methanes at high temperature: Effects of laser/thermal photochemistry

1993 ◽  
Vol 25 (1) ◽  
pp. 9-23 ◽  
Author(s):  
Philip H. Taylor ◽  
Zhen Jiang ◽  
Barry Dellinger
Keyword(s):  
High Temperature ◽  
Gas Phase ◽  
Temperature Effects ◽  
Chlorinated Methanes

Mass Spectrometry as a Tool for the Determination of Heats of Tautomerization of Thioamides in the Gas Phase

2005 ◽  
Vol 11 (1) ◽  
pp. 53-63 ◽  
Author(s):  
P.E. Allegretti ◽  
C.B. Milazzo ◽  
J.J.P. Furlong
Keyword(s):  
Mass Spectrometry ◽  
Gas Phase ◽  
Electron Energy ◽  
Temperature Effects ◽  
Mass Spectra ◽  
Theoretical Calculations ◽  
Neutral Species ◽  
Empirical Results ◽  
Semi Empirical

Tautomerism of several thioamides was studied by mass spectrometry. The analysis of the corresponding mass spectra allowed some fragmentations to be assigned to specific tautomers and heats of tautomerization to be determined through temperature effects and electron energy studies. Experimental determinations were strongly supported by theoretical calculations. AM1 semi-empirical results indicate that the thioamide–thioimidol equilibrium can be studied by mass spectrometry. Also, additional evidence was obtained regarding tautomerism occurrence between neutral species.

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