Vanadium (II) fluoride

Crystal structure
__ V 2+      __ F -
General
Surname	Vanadium (II) fluoride
other names	Vanadium difluoride Vanadium (II) fluoride Vanadium difluoride
Ratio formula	VF 2
Brief description	blue, crystalline powder
External identifiers / databases
CAS number 13842-80-3 Wikidata Q1523448
properties
Molar mass	88.938 g mol −1
Physical state	firmly
solubility	dissolves in water with formation of [V (H 2 O) 6 ] 2+ ions
safety instructions
GHS hazard labeling no classification available
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Vanadium (II) fluoride is a chemical compound of the elements vanadium and fluorine . It's a blue, crystalline powder.

Extraction and presentation

Vanadium (II) fluoride can be obtained by reducing vanadium (III) fluoride with hydrogen in a hydrogen fluoride solution at 1150 ° C:

${\displaystyle \mathrm {2\ VF_{3}+H_{2}\longrightarrow 2\ VF_{2}+2\ HF} }$

properties

Physical Properties

Vanadium (II) fluoride crystallizes in the tetragonal crystal system in the space group P 4 ₂ / mnm (space group no. 136) with the lattice parameters a  = 480.4  pm and c  = 323.7 pm.

Chemical properties

Vanadium (II) fluoride is a powerful reducing agent that even reduces nitrogen to hydrazine in the presence of magnesium hydroxide .

It dissolves in water with the formation of [V (H ₂ O) ₆ ] ²⁺ ions:

${\displaystyle \mathrm {V^{2+}+6\ H_{2}O\longrightarrow [V(H_{2}O)_{6}]^{2+}} }$

Individual evidence

1. ↑ Vanadium (II) fluoride on webelements.com
2. ^ ^{A b c} A. F. Holleman , E. Wiberg , N. Wiberg : Textbook of Inorganic Chemistry . 102nd edition. Walter de Gruyter, Berlin 2007, ISBN 978-3-11-017770-1 , p. 1550.
3. ↑ This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.
4. ↑ Lothar Kolditz: Inorganic Chemistry Part 2 . VEB Deutscher Verlag der Wissenschaften, Berlin, 1980, p. 641.
5. ↑ JW Stout, WOJ Boo: Crystalline vanadium (II) fluoride, VF ₂ . Preparation, structure, heat capacity from 5 to 300 ° K and magnetic ordering . In: The Journal of Chemical Physics . 71, 1, 1979, pp. 1-8, doi : 10.1063 / 1.438115 .