Mercury (I) fluoride

Crystal structure
__ Hg +      __ F -
Crystal system	tetragonal
Space group	I 4 / mmm (No. 139)
Lattice parameters	a = 367.3 pm c = 1088.4 pm
General
Surname	Mercury (I) fluoride
other names	Dimercury difluoride
Ratio formula	Hg 2 F 2
Brief description	yellow odorless solid
External identifiers / databases
CAS number 13967-25-4 EC number 237-747-9 ECHA InfoCard 100.034.302 PubChem 4084556 Wikidata Q172422
properties
Molar mass	439.18 g mol −1
Physical state	firmly
density	8.73 g cm −3
Melting point	570 ° C (decomposition)
solubility	Hydrolysis in water
safety instructions
GHS labeling of hazardous substances danger H and P phrases H: 300-310-330-373-410 P: 260-301 + 310-304 + 340-320-330-361-405-501
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Mercury (I) fluoride is an inorganic chemical compound of mercury from the group of fluorides .

Extraction and presentation

Mercury (I) fluoride can be obtained by reacting mercury (I) carbonate with hydrogen fluoride .

${\displaystyle \mathrm {Hg_{2}CO_{3}+2\ HF\longrightarrow Hg_{2}F_{2}+CO_{2}+H_{2}O} }$

properties

Mercury (I) fluoride is a yellowish solid, which soon turns black in the light, which hydrolyzes in water. It has a tetragonal crystal structure with the space group I 4 / mmm (space group no. 139) .

use

Mercury (I) fluoride can be used as a mild fluorinating agent.

Individual evidence

1. ^ E. Dorm: Studies on the crystal chemistry of the mercurous ion and of mercurous salts . In: Journal of the Chemical Society D: Chemical Communications , 1971 , pp. 466-467.
2. ↑ ^{a b c d e f g} Data sheet Mercury (I) fluoride, 97 +% from AlfaAesar, accessed on September 28, 2013 ( PDF )(JavaScript required) .
3. ↑ ^{a b} Georg Brauer (Ed.), With the collaboration of Marianne Baudler u a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume I, Ferdinand Enke, Stuttgart 1975, ISBN 3-432-02328-6 , p. 252.
4. ↑ Roger Blachnik (Ed.): Paperback for chemists and physicists . Volume III: Elements, Inorganic Compounds and Materials, Minerals . founded by Jean d'Ans, Ellen Lax. 4th, revised and revised edition. Springer, Berlin 1998, ISBN 3-540-60035-3 , pp. 482 ( limited preview in Google Book search).
5. ↑ Wolfgang A. Herrmann: Synthetic Methods of Organometallic and Inorganic Chemistry: Copper, silver ... Georg Thieme Verlag, 1999, ISBN 3-13-103061-5 , p. 196 ( limited preview in Google Book search).