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Properties of substance:
perbromyl fluoride
Group of substances:
inorganic
Physical appearance:
colorless gasEmpirical formula (Hill's system for organic substances):
BrFO3Structural formula as text:
BrO3FMolar/atomic mass: 146.901
Melting point (°C):
-110.35Boiling point (°C):
2.35CAS №: 25251-03-0
Density:
2.2 (0°C, g/cm3)
Synthesis 1:
Reference: Journal of the American Chemical Society. - 1969. - Vol. 91, No. 16 pp. 4561KBrO4 + 2HF + SbF5 → FBrO3 + KSbF6 + H2O
0.2889 g (1.579 mmoles) of KBrO4 was placed in a Kel-F tube. The tube was evacuated on a Monel vacuum line and chilled with liquid nitrogen; ca. 5 g of HF and 1.2 g of SbF5 were vacuum distilled into it. The mixture was warmed to room temperature, agitated to dissolve the perbromate, and allowed to stand for 1 hr. The HF and SbF5 were then removed by absorption on sodium fluoride, leaving 0.0380 ± 0.0005 atm of gaseous product at 25°. The product contained no significant quantity of gas that could not be condensed in a liquid nitrogen bath. The condensed product weighed 0.2255 ± 0.001 g, corresponding to a 97% yield of BrO3F with an apparent molecular weight of 145 ± 2 (calcd 146.9).
Vapour pressure (Torr):
5 (-85.1°C)
7 (-79.6°C)
125 (-36.1°C)
253 (-22.7°C)
424 (-11.85°C)
689 (0°C)
994 (9.47°C)
1418 (18.7°C)
Standard molar enthalpy (heat) of formation ΔfH0 (298.15 K, kJ/mol):
112.13 (l)Standard molar Gibbs energy of formation ΔfG0 (298.15 K, kJ/mol):
195.16 (l)Standard molar entropy S0 (298.15 K, J/(mol·K)):
206.84 (l)Standard molar enthalpy (heat) of formation ΔfH0 (298.15 K, kJ/mol):
137.5 (g)Standard molar Gibbs energy of formation ΔfG0 (298.15 K, kJ/mol):
193.06 (g)Standard molar entropy S0 (298.15 K, J/(mol·K)):
298.95 (g)References:
- Bretherick's Handbook of Reactive Chemical Hazards. - 6 ed., Vol. 1. - Butterworth-Heinemann, 1999. - pp. 95
- Inorganic Chemistry. - 1972. - Vol. 11, No. 4. - pp. 800-802
- Химическая энциклопедия. - Т. 1. - М.: Советская энциклопедия, 1988. - pp. 319 [Russian]
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© Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru