Accession Number : AD0288920

Title :   A STUDY OF FREE RADICALS AND OTHER INTERMEDIATE SPECIES AND INTERNAL ENERGY TRANSFER PROCESSES IN IRRADIATED CHEMICAL SYSTEMS

Corporate Author : AERONAUTICAL SYSTEMS DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : FENG,P.Y. ; KROTOSZYNSKI,B.K.

Report Date : SEP 1962

Pagination or Media Count : 1

Abstract : The role of internal energy transfer processes in radiation chemical reactions involving free radicals and other intermediate species, usingA SERIES OF ALKYL IODIDES WITH DIFFERENT CARBON CHAIN LENGTHS AS THE EXPERIMENTAL SYSTEMS IS STUDIED. It was found that, (1) with increasing size of the alkyl group in a homologous series, the extent of C-I bond rupture decreases regularly, whereas both the H2 and HI yields increase; (2) products with practically identical yields are formed in the radiolyses of two systems with similar elemental compositions, one consisting of pure C16H33I, and the other an equimolecular mixture of C8H18 and C8H17I. Analysis of these results, shows that energy initially localized elsewhere in an alkyl iodide molecule cannot efficiently cause C-I bond breakage despite the latter's low bond strength, i.e., internal energy transfer does not play an important role in these reactions. Instead, it is concluded that the product yields are dependent on the effective electron fractions of the various groups in the irradiated system. (Author)

Descriptors :   *FREE RADICALS, *ORGANIC COMPOUNDS, ALKYL RADICALS, CHEMICAL BONDS, ELECTRONS, GAMMA RAYS, HYDROGEN, HYDROGEN COMPOUNDS, INTERNAL CONVERSION, IODIDES, IODINE, OCTANES (8 C)

Distribution Statement : APPROVED FOR PUBLIC RELEASE