Gas-phase methylbenzenes isomerization. [Using products from. gamma. radiolysis of D/sub 2/ and T/sub 2/. beta. decay]

Journal Article · Thu Dec 30 04:00:00 EST 1976 · J. Phys. Chem.; (United States)

DOI:https://doi.org/10.1021/j100908a015· OSTI ID:7313047

Perez, G

Xylenes and trimethylbenzenes were isomerized in the gaseous phase using as protonating agents D/sub 3//sup +/ and HeT/sup +/ ion, obtained by ..gamma.. radiolysis of D/sub 2/, and by T/sub 2/..beta.. decay, respectively. Experiments with HeT/sup +/ ions confirmed that methylbenzenes undergo isomerization by intramolecular 1,2-methyl shifts. A protodemethylation reaction was also observed and was ascribed to the relatively high energy of the reactant. The use of the less energetic D/sub 3//sup +/ ions shows that the gas phase isomerization results are qualitatively in agreement with solution isomerization data. p-Xylene and o-xylene isomerize faster than m-xylene; m-xylene rearranges faster to p-xylene than to o-xylene. Mesitylene does not undergo isomerization, while hemimellitene isomerizes to pseudocumene which, more slowly, rearranges to give mesitylene. A reaction scheme is suggested and its kinetics studied.

• Research Organization: C.N.R., Rome
• OSTI ID: 7313047
• Journal Information: J. Phys. Chem.; (United States), Journal Name: J. Phys. Chem.; (United States) Vol. 80:27; ISSN JPCHA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
400301* -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
400600 -- Radiation Chemistry
400702 -- Radiochemistry & Nuclear Chemistry-- Properties of Radioactive Materials
AROMATICS
BASIC INTERACTIONS
BETA DECAY
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY
BETA-MINUS DECAY RADIOISOTOPES
CATIONS
CHARGED PARTICLES
CHEMICAL RADIATION EFFECTS
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
CHEMISTRY
DECAY
DECOMPOSITION
DEUTERIUM
ELECTROMAGNETIC RADIATION
GAMMA RADIATION
HELIUM COMPOUNDS
HELIUM TRITIDES
HYDROCARBONS
HYDROGEN ISOTOPES
INTERACTIONS
IONIZING RADIATIONS
IONS
ISOMERIZATION
ISOTOPES
KINETICS
LABELLED COMPOUNDS
LEPTONIC DECAY
LIGHT NUCLEI
MAGNETIC RESONANCE
MESITYLENE
NUCLEAR MAGNETIC RESONANCE
NUCLEI
ODD-EVEN NUCLEI
ODD-ODD NUCLEI
ORGANIC COMPOUNDS
PARTICLE DECAY
RADIATION CHEMISTRY
RADIATION EFFECTS
RADIATIONS
RADIOCHEMISTRY
RADIOISOTOPES
RADIOLYSIS
RARE GAS COMPOUNDS
REACTION KINETICS
RESONANCE
STABLE ISOTOPES
TRITIUM
TRITIUM COMPOUNDS
WEAK INTERACTIONS
WEAK PARTICLE DECAY
XYLENES
YEARS LIVING RADIOISOTOPES