Title: Perchloryl Fluoride
CAS Registry Number: 7616-94-6
Molecular Formula: ClFO3
Molecular Weight: 102.45
Percent Composition: Cl 34.61%, F 18.54%, O 46.85%
Literature References: Reviews: Downs, Adams in Comprehensive Inorganic Chemistry vol. 2, J. C. Bailar, Jr. et al., Eds. (Pergamon Press, Oxford, 1973) pp 1391-1393; Christe, Schack in Adv. Inorg. Chem. Radiochem. 18, 319-398.
Properties: Characteristic sweet odor. Usually stored in cylinders as liq under pressure. mp -147.7°. bp -46.7°. d20 (liq) 1.434. Critical temp 95.2°. Crit pressure 53 atm. Crit density: 0.637. Heat of vaporization 4.6 kcal/mol. Trouton constant: 20.4. Dipole moment 0.03. Heat of formation of gas at 25° -5.12 kcal/mol. Sp heat of liq: 0.229 cal/g/°C at -40°; 0.290 at +50°. Does not corrode base metals when anhydr. Shows the greatest resistance to electrical breakdown known for any gas. Handle with care. Do not bring in direct contact with reducing agents, alcohols, etc.: Chem. Eng. News 37, 60 (1959). Explosions have occurred.
Melting point: mp -147.7°
Boiling point: bp -46.7°
Density: d20 (liq) 1.434
CAUTION: Potential symptom of overexposure is respiratory system irritation; direct contact with liquid may cause frostbite. See NIOSH Pocket Guide to Chemical Hazards (DHHS/NIOSH 97-140, 1997) p 246. May cause methemoglobinemia, cyanosis, alveolar edema, bronchopneumonia. See Patty's Industrial Hygiene and Toxicology vol. 2F, G. D. Clayton, F. E. Clayton, Eds. (John Wiley & Sons, New York, 4th ed., 1994) p 4478.
Use: In organic synthesis to introduce fluorine atoms into organic molecules. As oxidizing agent; insulator for high voltage systems. |