6237. Molybdenum Hexafluoride

Nomenclature

CAS number: 7783-77-9
F6Mo; mol wt 209.93.
F 54.30%, Mo 45.70%.
MoF6.

Description and references

Prepd by direct fluorination of powdered molybdenum: Ruff, Ascher, Z. Anorg. Allg. Chem. 196, 418 (1931); from MoO3 and SF4: Oppengard et al., J. Am. Chem. Soc. 82, 3825 (1960).

Properties

Volatile, white, cubic crystals. Very hygroscopic. d19liq 2.543. mp 17.5°. bp 35.0°. Hydrolyzed by water. Forms blue-white clouds in moist air. Soly in anhydr HF: 1.5 moles/1000 g HF, Frlec, Hyman, Inorg. Chem. 6, 1596 (1967). Should be stored in quartz ampuls.