Phosphorus (II) fluoride

Structural formula
General
Surname	Phosphorus (II) fluoride
other names	Diphosphorus tetrafluoride Tetrafluorodiphosphine Tetrafluorodiphosphine
Molecular formula	P 2 F 4
Brief description	colorless gas
External identifiers / databases
CAS number 13824-74-3 PubChem 139615 Wikidata Q2088767
properties
Molar mass	137.94 g mol −1
Physical state	gaseous
Melting point	−86.5 ° C
boiling point	−6.2 ° C
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 .

Phosphorus (II) fluoride is a chemical compound with the empirical formula P ₂ F ₄ . The two phosphorus atoms in the +2 oxidation state are connected to one another via a single bond . Each phosphorus atom also has two bonds to fluorine atoms.

presentation

Phosphorus (II) fluoride can be produced by the reaction of phosphorodifluoride iodide with elemental mercury . Mercury (I) iodide precipitates here.

${\displaystyle \mathrm {2\ PF_{2}I\ +\ 2\ Hg\longrightarrow \ P_{2}F_{4}\ +\ Hg_{2}I_{2}} }$

use

The compound can be used for the synthesis of difluorophosphines. So added phosphorus (II) fluoride in a gas phase reaction by UV irradiation to the triple bond of alkynes .

Individual evidence

1. ^ ^{A b c d} A. F. Holleman , E. Wiberg , N. Wiberg : Textbook of Inorganic Chemistry . 101st edition. Walter de Gruyter, Berlin 1995, ISBN 3-11-012641-9 .
2. ↑ This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.
3. ^ JG Morse, JJ Mielcarek: Photoreactions of tetrafluorodiphosphine with alkynes. In: Journal of Fluorine Chemistry . 1988, No. 40, pp. 41-49. ISSN  0022-1139 .