Accession Number:

ADA071808

Title:

The alpha-Substitution Effect, Intramolecular or Medium Induced.

Descriptive Note:

Technical rept.,

Corporate Author:

CALIFORNIA UNIV LOS ANGELES DEPT OF CHEMISTRY

Personal Author(s):

• Prochorow,J.
• Hopewell,W.
• El-Sayed,M. A.

Report Date:

1979-07-01

Pagination or Media Count:

12.0

Abstract:

The lifetimes of ethyl- and tert-butyl benzene are measured in the gas phase and compared with one another and with those in solution. There is a large increase in the nonradiative lifetime upon going to the gas phase. Furthermore, the observed lifetime is found to be 80 nsec at low pressures, independent of the substituent, contrary to the results in solution the alpha-substitution effect. These results suggest that the alpha-substitution effect is solvent induced. Author

Descriptors:

• *FLUORESCENCE
• *LIFE EXPECTANCY(SERVICE LIFE)
• *SUBSTITUTION REACTIONS
• *BENZENE COMPOUNDS
• SOLUTIONS(MIXTURES)
• EXCITATION
• GASES
• BUTYL RADICALS
• ORGANIC SOLVENTS
• ETHYL RADICALS

Subject Categories:

• Organic Chemistry

Distribution Statement:

APPROVED FOR PUBLIC RELEASE