scholarly journals The free radical chain mechanism of the initial stages of crude oil oxidation in term of SARA fractions

2018 ◽  
Vol 155 ◽  
pp. 012013 ◽  
Author(s):  
A Ushakova ◽  
D Emelyanov ◽  
V Zatsepin ◽  
M Varfolomeev
Keyword(s):  
Free Radical ◽  
Crude Oil ◽  
Oil Oxidation ◽  
Chain Mechanism ◽  
Radical Chain ◽  
Radical Chain Mechanism ◽  
Sara Fractions

Metal ion initiated halogenation reaction of N-haloamines

1970 ◽  
Vol 48 (4) ◽  
pp. 544-545 ◽  
Author(s):  
F. Minisci ◽  
G. P. Gardini ◽  
F. Bertini
Keyword(s):  
Free Radical ◽  
Radical Cation ◽  
Chlorine Atom ◽  
Metal Ion ◽  
Chain Mechanism ◽  
Radical Chain ◽  
Radical Chain Mechanism ◽  
Halogenation Reaction ◽  
Amino Radical Cation ◽  
Methyl Heptanoate

The metal ion catalyzed chlorination of 1-chlorobutane, 1-chlorohexane, methyl-pentanoate, and methyl-heptanoate by protonated N-chloroamines proceeds by a free radical chain mechanism and the chain carrying species was shown not to be a chlorine atom, but an amino radical cation.

Catalysis of hydrogen peroxide dceomposition by 2-electron oxidation and reduction

1959 ◽  
Vol 12 (2) ◽  
pp. 147 ◽  
Author(s):  
NK King ◽  
ME Winfield
Keyword(s):  
Hydrogen Peroxide ◽  
Free Radical ◽  
Radical Formation ◽  
Single Electron ◽  
Chain Mechanism ◽  
Radical Chain ◽  
Radical Chain Mechanism ◽  
Free Radical Formation ◽  
Decomposition Of H2o2

A thermodynamical argument is used to support the suggestion made elsewhere that the more common radical chain mechanism for catalysed decomposition of H2O2 need not predominate if the catalyst can readily undergo a reversible 2-electron oxidation. How complete the exclusion of free radical formation may be depends upon the redox characteristics of the catalyst and on whether its oxidation by two single-electron steps is readily reversible along the same path.

Insight into the free-radical chain mechanism of gold-catalyzed hydrocarbon oxidation reactions in the liquid phase

2007 ◽  
Vol 122 (3-4) ◽  
pp. 284-291 ◽  
Author(s):  
Pascal Lignier ◽  
Franck Morfin ◽  
Laurent Piccolo ◽  
Jean-Luc Rousset ◽  
Valérie Caps
Keyword(s):  
Free Radical ◽  
Liquid Phase ◽  
Hydrocarbon Oxidation ◽  
Chain Mechanism ◽  
Oxidation Reactions ◽  
Radical Chain ◽  
Radical Chain Mechanism ◽  
Insight Into

Radical Additions to Fluoroolefins: Experimental Evidence for a Free-Radical Chain Mechanism in the Photo-Initiated Addition of Alcohols to Fluoroolefins

1995 ◽  
Vol 60 (4) ◽  
pp. 636-644 ◽  
Author(s):  
Oldřich Paleta ◽  
Jaroslav Kvíčala ◽  
Zuzana Budková ◽  
Hans-Joachim Timpe
Keyword(s):  
Free Radical ◽  
Quantum Yield ◽  
Experimental Evidence ◽  
Uv Light ◽  
Reaction System ◽  
Decay Kinetic ◽  
Quantum Yields ◽  
Chain Mechanism ◽  
Radical Chain ◽  
Radical Chain Mechanism

Photo-initiated addition of 2-propanol to two fluoroolefinic compounds, i.e. methyl 2,4,4,5,6,6-hexafluoro-3-oxa-2-(trifluoromethyl)hex-5-enoate (IV) containing perfluoroallyloxy group and 8,9-dichloro-1,1,2,4,4,5,7,7,8,9,9-undecafluoro-3,6-dioxa-5-(t rifluoromethyl)dodec-1-ene (V) containing trifluorovinyloxy group were used to verify a free-radical chain mechanism by means of quantum yield measurements based on substrate-decay kinetic. UV-Light energy (254 nm) was transferred to the reaction system via triplet-excited acetone. Quantum yields Fi of the addition products (X, XI) reached values 68 and 42, respectively, and thus confirmed the chain mechanism. The olefinic compounds IV and V were synthesized on the basis of the reaction of 2,3-dichloro-2,3,3-trifluoropropanoyl fluoride (I) with hexafluoropropene-1,2-oxide. The photoaddition of 2-propanol to both olefins took place with complete regioselectivity.

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