FREE-RADICAL REACTIONS WITH AROMATIC ETHERS: PART I. BENZOYL PEROXIDE WITH ANISOLE

1962 ◽  
Vol 40 (7) ◽  
pp. 1461-1470 ◽  
Author(s):  
Brian M. Lynch ◽  
Ralph B. Moore
Keyword(s):  
Thermal Decomposition ◽  
Free Radical ◽  
Benzoyl Peroxide ◽  
Radical Reactions ◽  
Free Radical Reactions

A re-examination of the products of thermal decomposition of benzoyl peroxide in anisole has resolved anomalous findings by previous workers. The expected phenylation of the substrate is accompanied by appreciable benzoyloxylation, and the distribution of isomers in the phenylation and benzoyloxylation products has been examined; the theoretical implications of the results are discussed.

Free radical reactions in solution. Part 6. Thermal decomposition of substituted dibenzyl mercurials in solution. An improved σ˙ scale

1981 ◽  
pp. 1121-1126 ◽  
Author(s):  
Suphi Dinçtürk ◽  
Richard A. Jackson ◽  
Michael Townson ◽  
Hikmet Aǧirbaş ◽  
Norman C. Billingham ◽  
...  
Keyword(s):  
Thermal Decomposition ◽  
Free Radical ◽  
Radical Reactions ◽  
Free Radical Reactions

THE DECOMPOSITION OF BENZOYL PEROXIDE IN BENZENE

1942 ◽  
Vol 20b (6) ◽  
pp. 103-113 ◽  
Author(s):  
J. H. McClure ◽  
R. E. Robertson ◽  
A. C. Cuthbertson
Keyword(s):  
Carbon Dioxide ◽  
Free Radical ◽  
Benzoyl Peroxide ◽  
Radical Reactions ◽  
Free Radical Reactions ◽  
First Order ◽  
Fast Reactions ◽  
Hydrogen Radicals ◽  
Peroxide Bond ◽  
Good Agreement

A kinetic study has been made of the decomposition of benzoyl peroxide in benzene. Kinetic data for this study have been obtained from three separate sets of measurements. Rate measurements from evolved carbon dioxide and direct iodometric measurements of peroxide are in good agreement. Alkali-metric determinations of the product, benzoic acid, have also been made during the course of the reaction.Gravimetric determinations show that the total evolved carbon dioxide from the reaction is a function of the temperature, and indicate that the mechanism involves two parallel fast reactions, one of which evolves one mole of carbon dioxide per mole of peroxide and the other two moles of carbon dioxide per mole of peroxide. The latter reaction predominates at higher temperatures.A kinetic analysis is included and provides for a slow reaction involving the rupture of the peroxide bond, followed by free radical reactions.[Formula: see text]The secondary free radical reactions would probably form hydrogen radicals, but there is evidence to support the view that these hydrogen radicals are not eliminated by mutual termination.The reaction is first order and the energy of activation was found to be 31,000 cal. per mole.

The initial reaction mechanism and thermal sensitivity of a fluoropolymer-containing energetic molecular system: the coupling effect of interfacial interactions and free radical reactions

CrystEngComm ◽  
2021 ◽  
Vol 23 (16) ◽  
pp. 3006-3014
Author(s):  
Wen Qian
Keyword(s):  
Free Radical ◽  
Coupling Effect ◽  
Molecular System ◽  
Thermal Sensitivity ◽  
Radical Reactions ◽  
Initial Reaction ◽  
Interfacial Interactions ◽  
Free Radical Reactions ◽  
Molecular Systems ◽  
Reactive Molecular Dynamics

A strategy combining classic and reactive molecular dynamics is applied to find the coupling effect of interfacial interactions and free radical reactions during the initial thermal decomposition of fluoropolymer-containing molecular systems.

Further studies on free-radical pathology in the major central nervous system disorders: effect of very high doses of methylprednisolone on the functional outcome, morphology, and chemistry of experimental spinal cord impact injury

1982 ◽  
Vol 60 (11) ◽  
pp. 1415-1424 ◽  
Author(s):  
H. B. Demopoulos ◽  
E. S. Flamm ◽  
M. L. Seligman ◽  
D. D. Pietronigro ◽  
J. Tomasula ◽  
...  
Keyword(s):  
Spinal Cord ◽  
Central Nervous System ◽  
Nervous System ◽  
Free Radical ◽  
Tissue Injury ◽  
Functional Restoration ◽  
Radical Reactions ◽  
Free Radical Reactions ◽  
Cord Injury

The hypothesis that pathologic free-radical reactions are initiated and catalyzed in the major central nervous system (CNS) disorders has been further supported by the current acute spinal cord injury work that has demonstrated the appearance of specific, cholesterol free-radical oxidation products. The significance of these products is suggested by the fact that: (i) they increase with time after injury; (ii) their production is curtailed with a steroidal antioxidant; (iii) high antioxidant doses of the steroidal antioxidant which curtail the development of free-radical product prevent tissue degeneration and permit functional restoration. The role of pathologic free-radical reactions is also inferred from the loss of ascorbic acid, a principal CNS antioxidant, and of extractable cholesterol. These losses are also prevented by the steroidal antioxidant. This model system is among others in the CNS which offer distinctive opportunities to study, in vivo, the onset and progression of membrane damaging free-radical reactions within well-defined parameters of time, extent of tissue injury, correlation with changes in membrane enzymes, and correlation with readily measurable in vivo functions.

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