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ELECTRON AFFINITIES OF INORGANIC RADICALS.
Final technical rept. 1 Feb 62-31 Jan 63,
COLLEGE OF ADVANCED TECHNOLOGY BIRMINGHAM (ENGLAND)
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The magnetron technique for the determination of electron affinities has been applied to the study of certain igrrganic radicals, wit satisfactory results. The pseudohalogens, CN, OCH, SCN and SeCN have received careful ae extensive study, with varied success. Thiocyanogen SCN2 forms negative ions very readily, and the electron affinity is 49 kcalsmole. A comparison with the results from thiocyanic acid HNCS indicates that the H-N bond energy in the latter compound is 110 kcalsmole, distinctly higher than in ammonia. Cyanogen CN2 and hydrocyanic acid HCN yield values for the heat of formation of the CN- ion in close agreement, but the doubts recently cast ohtthe heat of formation of the CN radical prevents this being expressed as an electron affinity. HNCO appeared to form CN- ions while SeCN2 and HSeCN were too unstable to study, although much time has been devoted to their preparation. The oxides CO2 and NO2 have been examined, and as a result, a considerable amount of work has been directed to the study of the thermionic work functions of oxidized filaments. Author
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