Studies on allylic peroxides. II. Allyl-t-butyl peroxide

1980 ◽  
Vol 58 (5) ◽  
pp. 450-453 ◽  
Author(s):  
R. Hiatt ◽  
V. G. K. Nair
Keyword(s):  
Computer Modelling ◽  
Hydrogen Abstraction ◽  
Radical Addition ◽  
Experimental Results ◽  
Alkoxy Radicals ◽  
Tert Butyl ◽  
Butyl Peroxide ◽  
Induced Decomposition ◽  
Good Agreement

Allyl-tert-butyl peroxide decomposes thermally in toluene with kd = 1013.8 exp (−33200/θ) (s−1). Product studies show the reaction to be a mixture of homolysis and radical-induced decomposition, the latter involving both radical addition to C=C and allyl hydrogen abstraction by alkoxy radicals. Computer modelling of the system gives good agreement with the experimental results and suggests that the overall decomposition is about 50% homolysis.

Induced decomposition of di-tert-butyl peroxide using chlorotris(triphenylphosphine)rhodium(I)/hydrogen

1973 ◽  
Vol 38 (15) ◽  
pp. 2722-2723 ◽  
Author(s):  
L. Kim ◽  
K. C. Dewhirst
Keyword(s):  
Tert Butyl ◽  
Butyl Peroxide ◽  
Induced Decomposition

ChemInform Abstract: Di-tert-Butyl Peroxide-Mediated Atom-Transfer Radical Addition of 2-Chlorodithiane to Aryl Alkynes under Mild Conditions.

ChemInform ◽  
2016 ◽  
Vol 47 (10) ◽  
pp. no-no
Author(s):  
Junshan Lai ◽  
Lixia Tian ◽  
Yongping Liang ◽  
Yuan Zhang ◽  
Xingang Xie ◽  
...  
Keyword(s):  
Radical Addition ◽  
Atom Transfer ◽  
Tert Butyl ◽  
Mild Conditions ◽  
Atom Transfer Radical Addition ◽  
Butyl Peroxide ◽  
Aryl Alkynes

Reactions of Alkoxy Radicals. I. The Reactions of Di-tert.-butyl Peroxide with n-Butyric Acid and Ethyl n-Butyrate

1960 ◽  
Vol 13 (2) ◽  
pp. 244 ◽  
Author(s):  
ALJ Beckwith
Keyword(s):  
Butyric Acid ◽  
Electron Acceptor ◽  
Dicarboxylic Acids ◽  
Cupric Chloride ◽  
Hydrogen Atoms ◽  
Alkoxy Radicals ◽  
Tert Butyl ◽  
Butyl Peroxide ◽  
Butoxy Radical

The relative yields of meso- and racernic-2,3-diethylsucoinic and 2-ethyl-3-methyl-glutaric acids from the reaction of di-tert.-butyl peroxide with n-butyric acid indicate that abstraction of hydrogen atoms from the acid by tert.-butoxy radicals occurs preferentially at the α-position. A similar directive effect has been noted in the reaction of ethyl n-butyrate with di-tert.-butyl peroxide. These results suggest that the tert.-butoxy radical has negligible electron-acceptor properties and that polar effects do not influence the course of its reactions. Catalytic amounts of cupric chloride profoundly modify the reaction of di-tert.-butyl peroxide with n-butyric acid. New analytical methods for the separation and determination of hydroxy- and dicarboxylic acids are described.

Di-tert-Butyl Peroxide-Mediated Atom-Transfer Radical Addition of 2-Chlorodithiane to Aryl Alkynes under Mild Conditions

2015 ◽  
Vol 21 (41) ◽  
pp. 14328-14331 ◽  
Author(s):  
Junshan Lai ◽  
Lixia Tian ◽  
Yongping Liang ◽  
Yuan Zhang ◽  
Xingang Xie ◽  
...  
Keyword(s):  
Radical Addition ◽  
Atom Transfer ◽  
Tert Butyl ◽  
Mild Conditions ◽  
Atom Transfer Radical Addition ◽  
Butyl Peroxide ◽  
Aryl Alkynes

THE INDUCED DECOMPOSITION OF tert-BUTYL HYDROPEROXIDE

1964 ◽  
Vol 42 (12) ◽  
pp. 2754-2757 ◽  
Author(s):  
R. Hiatt ◽  
John Clipsham ◽  
Teunis Visser
Keyword(s):  
Peroxy Radicals ◽  
Homolytic Cleavage ◽  
Alkoxy Radicals ◽  
Butyl Hydroperoxide ◽  
Tert Butyl ◽  
Tert Butyl Hydroperoxide ◽  
Induced Decomposition

In a study of the "induced" decomposition of hydroperoxides by alkoxy radicals, tert-butyl hydroperoxide has been decomposed by the action of di-tert-butyl peroxyoxalate at 45°. The homolytic cleavage of peroxalate to tert-butoxy was unaffected by the presence of hydroperoxide and 7 to 10 molecules of hydroperoxide were destroyed for each radical thus produced. The kinetics have been analyzed and a mechanism developed which has significance for any system containing peroxy radicals.

Acid-Induced Decomposition of Di-tert-butyl Peroxide inn-Heptane Solution up to High Temperatures and Pressures

1999 ◽  
Vol 210 (Part_1) ◽  
pp. 61-81 ◽  
Author(s):  
Michael Buback ◽  
Lars Wittkowski
Keyword(s):  
High Temperatures ◽  
Tert Butyl ◽  
Butyl Peroxide ◽  
Induced Decomposition

Inducing Frictional Force to Enhance the Transient Response in Beams

2019 ◽  
Vol 22 (2) ◽  
pp. 88-93
Author(s):  
Hamed Khanger Mina ◽  
Waleed K. Al-Ashtrai
Keyword(s):  
Numerical Analysis ◽  
Transient Response ◽  
Frictional Force ◽  
Damping Ratio ◽  
Experimental Results ◽  
Damping Capacity ◽  
Tightening Force ◽  
Contact Areas ◽  
Good Agreement ◽  
Ansys Workbench

This paper studies the effect of contact areas on the transient response of mechanical structures. Precisely, it investigates replacing the ordinary beam of a structure by two beams of half the thickness, which are joined by bolts. The response of these beams is controlled by adjusting the tightening of the connecting bolts and hence changing the magnitude of the induced frictional force between the two beams which affect the beams damping capacity. A cantilever of two beams joined together by bolts has been investigated numerically and experimentally. The numerical analysis was performed using ANSYS-Workbench version 17.2. A good agreement between the numerical and experimental results has been obtained. In general, results showed that the two beams vibrate independently when the bolts were loosed and the structure stiffness is about 20 N/m and the damping ratio is about 0.008. With increasing the bolts tightening, the stiffness and the damping ratio of the structure were also increased till they reach their maximum values when the tightening force equals to 8330 N, where the structure now has stiffness equals to 88 N/m and the damping ratio is about 0.062. Beyond this force value, increasing the bolts tightening has no effect on stiffness of the structure while the damping ratio is decreased until it returned to 0.008 when the bolts tightening becomes immense and the beams behave as one beam of double thickness.

Fundamental Thermal Hazard Investigation for Tert-Butyl Peroxide Reactor Using DSC and TGA Techniques

2011 ◽  
Vol 21 (1) ◽  
pp. 53-63 ◽  
Author(s):  
Chien-Jung Chen ◽  
Jen-Hao Chi ◽  
Sheng-Hung Wu ◽  
Cheng-Tung Chen ◽  
Hsiu-Fen Tsai
Keyword(s):  
Thermal Hazard ◽  
Tert Butyl ◽  
Butyl Peroxide
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