Abstract
Selected low molecular weight hydrocarbon glasses at approximately 77°K were irradiated with ultraviolet light, producing trapped radicals which were studied by ESR. Straight chain alkenes exhibited spectra which were demonstrated, through tests with 1-hexene, to be the result of free radical reactions initiated by the photolysis of peroxide impurities. Other experiments with 1-hexene are reported. Symmetric alkene spectra were interpreted in terms of the following model: (A) Primary (peroxide) radicals, formed by uv photolysis, react with molecular end groups by abstraction or terminal addition to produce the observed spectra. (B) In the π-electron radicals assumed to be formed, the isotropic proton hyperfine coupling constants (which determine the observed approximate component separations) are taken to have the fixed values: α protons, 22 G; methylene protons, 22 G (β1) and 44 G (β2); methyl protons, 22 G. (The α-proton anisotropic splitting is manifested only as a broadening of the components.) In terms of this model, interpretations of the spectra obtained from 2-pentene, 1- and 2-hexene, 1-, 2-, and 3-heptene, 1- and 2-octene, and 1-decene are presented.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
