Formation of Trimer and Dimer Radical Cations of Methyl-Substituted Benzenes in γ-Irradiated Low-Temperature Matrices

2006 ◽  
Vol 110 (26) ◽  
pp. 8073-8080 ◽  
Author(s):  
Kazumasa Okamoto ◽  
Shu Seki ◽  
Seiichi Tagawa
Keyword(s):  
Low Temperature ◽  
Radical Cations ◽  
Substituted Benzenes

Low-temperature study of radical cations of quadricyclane and norbornadiene in Na-ZSM-5 zeolites

1994 ◽  
Vol 218 (5-6) ◽  
pp. 485-491 ◽  
Author(s):  
K.R. Cromack ◽  
D.W. Werst ◽  
M.V. Barnabas ◽  
A.D. Trifunac
Keyword(s):  
Low Temperature ◽  
Radical Cations ◽  
Temperature Study

Low temperature gas phase and matrix studies of the C6H3F3+ and C6H3Cl3+ radical cations

1980 ◽  
Vol 73 (5) ◽  
pp. 2063-2068 ◽  
Author(s):  
V. E. Bondybey ◽  
T. J. Sears ◽  
J. H. English ◽  
Terry A. Miller
Keyword(s):  
Low Temperature ◽  
Gas Phase ◽  
Radical Cations

Far infrared spectra and vibrational assignments of substituted benzenes

1967 ◽  
Vol 298 (1452) ◽  
pp. 51-63 ◽  
Keyword(s):  
Low Temperature ◽  
Low Frequency ◽  
Far Infrared ◽  
Marked Variation ◽  
Frequency Range ◽  
Substituted Benzenes ◽  
Low Frequencies ◽  
Vibrational Assignments ◽  
Bending Mode ◽  
Far Infrared Spectra

The vibrational absorption spectra of some substituted benzenes have been measured in the range 50 to 450 cm -1 . The compounds were measured as liquids, in solutions, as crystalline solidsat low temperature, and in polyethylene matrices. The extension of the infrared spectrum to very low frequencies has made it possible to determine new values for many fundamental vibrations. An assignment of all the vibrational frequencies in the low-frequency range has been made, from the infrared and Raman data, for p -dihalogeno-benzenes, p -halogenotoluenes, p -halogeno-nitrobenzenes, and for some mono-substituted benzenes. Some measurements have been made on the marked variation of intensity of the lowest frequency bending mode of p -dihalogeno-benzenes.

Cavitation-induced Reactions in Pure Substituted Benzenes

1972 ◽  
Vol 50 (11) ◽  
pp. 1743-1750 ◽  
Author(s):  
G. K. Diedrich ◽  
P. Kruus ◽  
L. M. Rachlis
Keyword(s):  
Thermal Decomposition ◽  
Low Temperature ◽  
Bond Dissociation Energy ◽  
Dissociation Energy ◽  
Cavitation Bubble ◽  
Reaction Rate ◽  
Substituted Benzenes ◽  
Thermal Reactions ◽  
Initiation Reaction ◽  
Low Temperature Pyrolysis

The formation of polymers has been observed on exposure of pure substituted benzenes to ultrasound intense enough to cause cavitation. The products have some of the characteristics of the char obtained from low temperature pyrolysis of hydrocarbons. They are difficult to dissolve, melt above 300 °C, and give a large broad e.p.r. signal. A crude correlation between bond dissociation energy and the reaction rate suggests that the initiation reaction is a thermal decomposition in a cavitation bubble. The phenomenon is compared to radiolysis and thermal reactions.

EPR study of methyl and ethyl acrylate radical cations and their transformations in low-temperature matrices

2002 ◽  
pp. 687-699 ◽  
Author(s):  
Wolfgang Knolle ◽  
Vladimir I. Feldman ◽  
Igor Janovský ◽  
Sergej Naumov ◽  
Reiner Mehnert ◽  
...  
Keyword(s):  
Low Temperature ◽  
Radical Cations ◽  
Ethyl Acrylate
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