Vanadium Trifluoride
Title: Vanadium Trifluoride
CAS Registry Number: 10049-12-4
Molecular Formula: F3V
Molecular Weight: 107.94
Percent Composition: F 52.80%, V 47.19%
Line Formula: VF3
Literature References: Prepd from VCl3 and HF: Ruff, Lickfett, Ber. 44, 2539 (1911); from VCl2 and HF: Emeleus, Gutmann, J. Chem. Soc. 1949, 2979; by thermal decompn in an inert atm of (NH4)3VF6: Sturm, Sheridan, Inorg. Synth. 7, 87 (1963).
Properties: Greenish-yellow powder. d 3.363. mp approx 1406°. Sublimes at bright red heat. Almost insol in water, alcohol, acetone, ethyl acetate, acetic anhydride, glacial acetic acid, toluene, carbon tetrachloride, chloroform, carbon disulfide. Black color with NaOH soln. Aq solns have strong reducing properties.
Melting point: mp approx 1406°
Density: d 3.363
 
Derivative Type: Trihydrate
Properties: Dark green rhombohedral crystals, obtained by crystallizing vanadium trioxide dissolved in hydrofluoric acid, or by electrolytic reduction of a soln of vanadium pentoxide in aq HF. Loses one molecule of water at 100°. Dissolves in water to some extent, forming autocomplexes.

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