Thermochemistry of Oxygen-Fluorine Bonding
Abstract
IR spectra of NO2F, which are free of NO2 absorption peaks, have been obtained by the addition of excess F to the product in the IR cell. An apparent equilibrium dissociation of NO normally leads to partial decomposition of NO2F. Preliminary calorimetric determinations of the heat evolved during formation of FClO4 by fluorination of 70% HClO4 yielded an approximate value for the heat of formation of FClO4 of + 0.69 Kcal/mole. Detailed studies of the synthesis of trifluoromethyl hypofluorite, fluorine fluorosulfonate, and pentafluorosulfur hypofluorite were conducted to establish optimum F into NO2 and F exists which normally leads to partial decomposition of NO2F. Preliminary calorimetric determinations of the heat evolved during formation of FClO4 by fluorination of 70% HClO4 yielded an approximate value for the heat of formation of FClO4 of + 0.69 Kcal/mole. Detailed studies of the synthesis of trifluoromethyl hypofluorite, fluorine fluorosulfonate, and pentafluorosulfur hypofluorite were conducted to establish optimum reaction conditions. Material of high purity was obtained; however, further purification will be required for pentafluorosulfur hypofluorite, which was isolated at approximately 90% purity. Several reactions were evaluated to determine their suitability for the calorimetric evaluation of their heat of reaction with FNO3. None has been completely satisfactory, and additional reactions are being considered. Similarly, CF3OF, FSO3F, and F5SOF were unreactive with H, and since the synthesis reactions are also unsatisfactory for calorimetry studies, other reactions are being screened.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 31, 1962
- Accession Number
- AD0285522
Entities
People
- J. D. Breazeale