The Preparation and Some Properties of Platinum Hexafluoride ^1,2

Journal Article · Wed Nov 01 04:00:00 EST 1961 · Journal of the American Chemical Society

DOI:https://doi.org/10.1021/ja01482a002· OSTI ID:4833891

Weinstock, Bernard; Malm, John G.; Weaver, E. Eugene

Platinum hexafluoride is the first simple hexavalent platinum compound that has been prepared. This was achieved by burning a platinum wire in a fluorine atmosphere adjacent to a cold surface with yields of up to 70%. The formula was established by chemical analyses and vapor density. A solid transition occurs at 3.0 deg , 32.5 mm pressure and the fusion point is 61.3-, 586 mm. The heat of transition is 2140 cal mole/sup -1/ and the heat of fusion is 1080 cal mole/sup -1/. The vapor pressure equations are: orthorhombic solid, log P (mnm) = --3147.6/T - 6.09 log T + 27.7758; cubic solid, log P (mm) = 2528.7/ T -4.080 log T + 20.6280; liquid, log P (mm) = --5685.8/T - 27.485 log T + boiling point of the known hexafiuorides. The heat of vaporization at the boiling point is 7060 cal mole/sup -1/. The liquid density is 3.826 g cc/sup -1/ at 64.3 deg . The density of the low temperature solid varies between 6.0-5.0 g cc/sup -1/ in the range 77-254 deg K. The vapor and liquid are red in color and the solids appear black. The molecule does not rotate freely in any of the condensed phases. Platinum hexafluoride f s the least stable and most reactive of the known hexafluorides. The use of PtF/sub 6/ as a fluorinating agent at room temperature to form BrF/sub 5/, NpF/sub 6/, and PuF/sub 6/ is described.

• Research Organization: Argonne National Lab., Ill.
• Sponsoring Organization: USDOE
• NSA Number: NSA-16-001749
• OSTI ID: 4833891
• Journal Information: Journal of the American Chemical Society, Journal Name: Journal of the American Chemical Society Journal Issue: 21 Vol. 83; ISSN 0002-7863
• Publisher: American Chemical Society (ACS)
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

BOILING
BROMINE FLUORIDES
CHEMISTRY
COLOR
COMBUSTION
DENSITY
ENERGY LEVELS
EQUATIONS
FLUORINATION
FLUORINE
LATTICES
LIQUIDS
MELTING POINTS
MOLECULES
NEPTUNIUM FLUORIDES
NUMERICALS
PLATINUM
PLATINUM FLUORIDES
PLUTONIUM FLUORIDES
PREPARATION
PRESSURE
QUALITATIVE ANALYSIS
REACTIVITY
SOLIDS
STABILITY
SURFACES
TEMPERATURE
VAPORS
WIRES