Iodine heptafluoride

Structural formula
General
Surname	Iodine heptafluoride
other names	Iodine (VII) fluoride
Molecular formula	IF 7
Brief description	colorless gas
External identifiers / databases
CAS number 16921-96-3 EC number 240-981-4 ECHA InfoCard 100.037.241 PubChem 85645 Wikidata Q417165
properties
Molar mass	259.89 g mol −1
Physical state	gaseous
density	2.8 g cm −3 (at 6 ° C, as a liquid)
Sublimation point	4.8 ° 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 .

Iodine heptafluoride , also known as iodine (VII) fluoride , is a chemical compound made up of the elements iodine and fluorine in a ratio of 1: 7. It belongs to the interhalogen compounds .

presentation

Iodine heptafluoride can be made from the elements in two steps. First, iodine is burned in fluorine to form iodine pentafluoride . After increasing the temperature to 300 ° C. and adding more fluorine, the reaction product can be collected.

properties

Iodine heptafluoride is a strongly fluorinated reagent that even reacts with glass and water and irritates the skin and mucous membranes . As a solid, it forms colorless crystals that sublime at 4.8 ° C. Iodine heptafluoride molecules have a pentagonal bipyramidal structure as predicted by the VSEPR model . The temperature at the triple point is 6.5 ° C.

The bipyramidal structure of iodine heptafluoride.
The bond lengths and angles are marked.

Individual evidence

1. ↑ toilet Schumb, MA Lynch, Jr .: Iodine Heptafluoride. Preparation and some properties. Ind. And Eng. Chem. 42/7/ 1950 . Pp. 1383-1386; doi : 10.1021 / ie50487a035 .
2. ^ Jean D'Ans, Ellen Lax: Pocket book for chemists and physicists . Third edition, Volume 1, pp. 370-371.
3. ↑ ^{a b} David R. Lide (Ed.): CRC Handbook of Chemistry and Physics . 90th edition. (Internet version: 2010), CRC Press / Taylor and Francis, Boca Raton, FL, Properties of the Elements and Inorganic Compounds, pp. 4-67.
4. ↑ This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.
5. ↑ G. Brauer (Ed.): Handbook of Preparative Inorganic Chemistry , 2nd ed., Vol. 1, Academic Press 1963, ISBN 0-12126601-X , pp. 160-161.