Accession Number : AD0614509

Title :   CO-CATELYSES IN FRIEDEL-CRAFTS REACTIONS. PART VII. THE FORMATION OF ULTRAVIOLET CHROMOPHORES,

Corporate Author : NATIONAL RESEARCH COUNCIL OF CANADA OTTAWA (ONTARIO) DIV OF APPLIED CHEMISTRY

Personal Author(s) : Roberts,J. M.

Report Date : 10 FEB 1964

Pagination or Media Count : 10

Abstract : Solutions of butene in ethylene dichloride with boron trifluoride and hydroxylic co-catalysts slowly develop an absorption band with a peak at 304 = 2 m micron, in addition to isomerising and polymerising. The kinetics of peak growth show that the band is not due to an intermediate in the isomerisation or polymerisation reactions, but may be due to alkylated alkenyl cations, formed by hydride abstraction from butene or unsaturated polybutene by aliphatic carbonium ions. The ultraviolet spectra obtained from conjugated dienes in acid solutions closely resemble those obtained from butene in the solutions described above. (Author)

Descriptors :   (*ALKENES, FRIEDEL CRAFTS REACTIONS), ULTRAVIOLET SPECTROSCOPY, ABSORPTION SPECTRA, ISOMERIC TRANSITIONS, POLYMERIZATION, CATALYSIS, BORON COMPOUNDS, FLUORIDES, CARBOXYLIC ACIDS, SOLVENTS, HALOGENATED HYDROCARBONS

Distribution Statement : APPROVED FOR PUBLIC RELEASE