Pulsed photolysis-laser-induced fluorescence measurements of the rate constants for reactions of the cyanogen radical with hydrogen, oxygen, ammonia, hydrogen chloride, hydrogen bromide, and hydrogen iodide

1987 ◽  
Vol 91 (1) ◽  
pp. 69-72 ◽  
Author(s):  
Julian. De Juan ◽  
Ian W. M. Smith ◽  
B. Veyret
Keyword(s):  
Hydrogen Chloride ◽  
Rate Constants ◽  
Hydrogen Bromide ◽  
Laser Induced Fluorescence ◽  
Hydrogen Iodide ◽  
Fluorescence Measurements ◽  
Photolysis Laser ◽  
Pulsed Photolysis

Catalysis by hydrogen halides in the gas phase. XIII. Isopropanol and hydrogen iodide

1967 ◽  
Vol 20 (6) ◽  
pp. 1143 ◽  
Author(s):  
RL Failes ◽  
VR Stimson
Keyword(s):  
Gas Phase ◽  
Hydrogen Chloride ◽  
Rate Constants ◽  
Arrhenius Equation ◽  
Hydrogen Bromide ◽  
Hydrogen Iodide ◽  
Initial Reaction ◽  
Hydrogen Halides ◽  
The Individual

Hydrogen iodide catalyses the decomposition of isopropanol into propene and water at 356 to 457�, viz. �������������������������� i-C3H7OH+HI → C3H6+H2O+HI This is followed by the faster reactions �������������������������� C3H6+HI → i-C3H7I ����� ��������������������i-C3H7I+HI → C3H8+I2������������������������ i-C3H7OH+I2 → (CH3)2CO+2HI The rates of the initial reaction fit the Arrhenius equation ����������������� k2 = 1012.24 exp(-31900/RT) sec-1 ml mole-1 and it is believed to be homogeneous and molecular. It is faster than the corresponding reactions with hydrogen chloride and hydrogen bromide in the ratios 100 : 1 and 5 : 1, respectively. For the overall reaction the amounts of the products formed to 70% reaction, computed with the use of rate constants of the individual reactions, agree well with the amounts found by analysis.

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