Nomenclature
CAS number: 7783-63-3
F
4Ti; mol wt 123.86.
F 61.35%, Ti 38.65%.
TiF
4.
Description and references
Prepd by the reaction of hydrogen fluoride
with titanium tetrachloride: Ruff, Ipsen, Ber. 36, 1777 (1903); Ruff, Plato, ibid. 37, 673 (1904); by the action
of fluorine on the metal or the dioxide: Haendler et al., J. Am. Chem. Soc. 76, 2177 (1954).
Properties
Powdery white mass. d420 2.798. Sublimes at 284°.
mp >400°. Hisses
on contact with water. Very hygroscopic; the dihydrate may be crystallized
from aqueous soln (also obtained from solns of TiO2 in
HF). Aq solns hydrolyze slowly, and the existence of an oxyfluoride,
TiOF2, has been established. Also sol in alcohol and pyridine
from which the compds TiF4.2EtOH and TiF4.C5H5N have been isolated. Insol in ether. Dry ammonia
is absorbed at room temp to form TiF4.4NH3,
but at 120° TiF4.2NH3 is the stable phase.
This is sol in water and is sufficiently stable to sublime. TiF4 is also sol in phosphorus oxychloride, but at 30° a reaction
occurs and POF3 is evolved. See also Emeléus
in Fluorine Chemistry vol.
I, J. H. Simons, Ed. (Academic Press, New York, 1950) p 47.