Nomenclature
CAS number: 10026-02-5
Cl
4Po; mol wt 350.79.
Cl 40.43%, Po 59.57%.
PoCl
4.
Description and references
May be prepd by dissolving metallic polonium
in hydrochloric acid; by heating polonium dioxide in carbon tetrachloride
vapor at 200°; by heating the metal in dry chlorine at 200°; also
by heating the dioxide in dry hydrogen chloride, thionyl chloride
vapor, or with phosphorus pentachloride: Review: K. W.
Bagnall, Chemistry of the Rare Radioelements (Butterworths, London, 1957) p 64.
Properties
Hygroscopic, bright yellow, cryst solid. Monoclinic
or triclinic. Hydrolyzed by moist air, forming a white solid of indefinite
composition. mp ≈300° (in chlorine), turns scarlet red at 350°. bp 390°. Vapors are purple-brown,
turning blue-green >500°. Sol in water (fairly slow hydrolysis).
Freely sol in hydochloric acid, thionyl chloride. Moderately sol
in ethanol, acetone. Dec by dil nitric acid. Forms a complex with
two moles of tributyl phosphate.Status
This monograph has been retired and is no longer subject
to revision or update.