Dichloroheptoxide

Structural formula
General
Surname	Dichloroheptoxide
Molecular formula	Cl 2 O 7
Brief description	colorless oil
External identifiers / databases
CAS number 12015-53-1 PubChem 123272 Wikidata Q2301593
properties
Molar mass	182.9 g mol −1
Physical state	liquid
density	1.86 g cm −3 (0 ° C)
Melting point	−91.5 ° C
boiling point	82 ° 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 .

Dichlorheptaoxide is a chemical compound from the group of chlorine oxides .

Extraction and presentation

Dichloroheptaoxide is the anhydride of perchloric acid and can accordingly be prepared by dehydrating perchloric acid with phosphorus pentoxide at temperatures between −70 ° C and 0 ° C with a subsequent vacuum distillation.

${\displaystyle \mathrm {4\ HClO_{4}+P_{4}O_{10}\longrightarrow 2\ Cl_{2}O_{7}+4\ HPO_{3}} }$

properties

Dichloroheptoxide is a colorless, very volatile oil. It is more resistant than the other chlorine oxides , but it explodes on contact with a flame or by impact. It reacts with water to form perchloric acid. The molecule has no mirror plane, the two ClO ₃ groups are rotated by 15 ° against each other.

Individual evidence

1. ↑ ^{a b c d e f g} 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. 315.
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. ↑ Ralf Steudel : Chemistry of Non-Metals: From Structure and Bond to Application . Walter de Gruyter, 2008, ISBN 3-11-021128-9 , p. 514 ( limited preview in Google Book search).