Accession Number : AD0442325


Title :   REACTION OF PERFLUOROALKYL RADICALS WITH MOLECULAR HYDROGEN,


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


Personal Author(s) : Kutschke,K O


Report Date : 13 Dec 1963


Pagination or Media Count : 4


Abstract : A certain ambiguity exists in the interpretation of data obtained in studies of reactions of the type R + H2 yielding RH + H (and analogous reactions with D2 and HD) in which R is some free radical. The discussion below is developed with those systems in mind in which R is a perfluoroalkyl radical. The ambiguity arises because it has not been possible to specify precisely the fate of the atom formed in the reaction. In most studies the photolysis of the appropriate perfluoroketone was used as the radical source. Recently an investigation was made of the reaction, with R = C2F5 and C3F7, in which the radicals were generated by the photolysis of the corresponding aldehyde. Values of the Arrhenius parameters obtained from the different studies involving the two radical sources are closely similar. Evidence has indicated that the atoms disappear predominantly by reaction with aldehyde in their systems. Insofar as this evidence of a unique fate for atoms in the aldehyde systems is valid, the agreement between the results from the aldehyde and ketone systems indicates that the atoms enter only one reaction in the ketone system as well. The basis for this statement is given here; the argument is developed for the reaction R + H2. (Author)


Descriptors :   *FLUORINE COMPOUNDS , *KETONES , *HYDROGEN , ALDEHYDES , DEUTERIUM COMPOUNDS , IONIZATION , FREE RADICALS , IONS


Distribution Statement : APPROVED FOR PUBLIC RELEASE