Kinetics of polymer formation by free radical mechanism

1959 ◽  
Vol 36 (4) ◽  
pp. 174 ◽  
Author(s):  
Thomas E. Ferington
Keyword(s):  
Free Radical ◽  
Radical Mechanism ◽  
Polymer Formation ◽  
Free Radical Mechanism ◽  
Kinetics Of

The kinetics of the oxidation of ammonia by nitrous oxide

1964 ◽  
Vol 17 (2) ◽  
pp. 202 ◽  
Author(s):  
TN Bell ◽  
JW Hedger
Keyword(s):  
Thermal Decomposition ◽  
Nitrous Oxide ◽  
Free Radical ◽  
Rate Equation ◽  
Radical Mechanism ◽  
15N Isotope ◽  
Free Radical Mechanism ◽  
Products Of Reaction ◽  
Kinetics Of ◽  
Decomposition Of Nitrous Oxide

Ammonia is oxidized by nitrous oxide smoothly and homogeneously at temperatures between 658 and 730� and total pressures up to 250 mm. The products of reaction, nitrogen, water, and hydrazine are accounted for by a free-radical mechanism initiated by oxygen atoms which result from the thermal decomposition of nitrous oxide. Ammonia labelled with the 15N-isotope was used to distinguish between the nitrogen formed from the nitrous oxide and that from the ammonia. The kinetics follow an empirical rate equation, ������������� Rate = k'[N2O]1.56 + k"[N2O]0.61[NH3]. This is of a form which shows the importance of the ammonia molecule participating in the activation of nitrous oxide through bimolecular collision. Assigning a collisional efficiency of unity for like N2O-N2O collisions, the efficiency of ammonia in the process ������������ NH3 + N2O → NH3 + N2O* is determined as 0.85.

Stoichiometry and Kinetics of the Cobalt(III) Oxidation of Acetamide, Formamide, N-Methylformamide and N,N-Dimethylformamide in Acid Perchlorate Solutions

1979 ◽  
Vol 32 (3) ◽  
pp. 537 ◽  
Author(s):  
F Ahmad ◽  
VS Baswani
Keyword(s):  
Free Radical ◽  
Perchloric Acid ◽  
Activation Energies ◽  
Radical Mechanism ◽  
Rate Law ◽  
Free Radical Mechanism ◽  
Kinetics Of

The oxidation of acetamide, formamide, N-methylformamide and N,N-dimethylformamide by cobalt(III) in perchloric acid at 20°C has been investigated. The reaction requires nearly three moles of cobalt(III) for one mole of amide (except acetamide) and nearly one mole of cobalt(III) is consumed per mole of acetamide, and leads in each case to the formation of the respective amines. The oxidation of the amides is found to obey the rate law -d[CoIII]/dt = (k' + k''[H+])[Co3+] A free-radical mechanism has been proposed for the reaction. Activation energies and entropies are calculated for each reaction.

Comparative QSAR evidence for a free-radical mechanism of phenol-induced toxicity

2000 ◽  
Vol 127 (1) ◽  
pp. 61-72 ◽  
Author(s):  
Corwin Hansch ◽  
Susan C. McKarns ◽  
Carr J. Smith ◽  
David J. Doolittle
Keyword(s):  
Free Radical ◽  
Radical Mechanism ◽  
Free Radical Mechanism

Dirhodium(II)-Catalyzed Diamination Reaction via a Free Radical Pathway

2021 ◽  
Author(s):  
Zhiying Fan ◽  
Zhifan Wang ◽  
Ruoyi Shi ◽  
Yuanhua Wang
Keyword(s):  
Free Radical ◽  
Bond Formation ◽  
Mechanistic Study ◽  
Radical Mechanism ◽  
Free Radical Mechanism

Unlike C-N bond formation with classical dirhodium(II)-nitrenoids as the key intermediate, dirhodium(II)-catalyzed 1,2-and 1,3-diamination reactions are realized by a free radical mechanism. A mechanistic study revealed that the reactions undergo...

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