Tetraiodonona oxide

Structural formula
	No drawing available
General
Surname	Tetraiodonona oxide
Molecular formula	I 4 O 9
Brief description	light yellow solid
External identifiers / databases
Wikidata	Q15069517
properties
Molar mass	651.61 g mol −1
Physical state	firmly
Melting point	75 ° C (decomposition)
safety instructions
GHS hazard labeling ; no classification available
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 .

Tetraiodononaoxide is a chemical compound from the group of iodine oxides .

Extraction and presentation

Tetraiodononaoxide can be obtained in quantitative yield by the action of ozone on iodine in carbon tetrachloride at −78 ° C.

{\ displaystyle {\ ce {2I2 + 9O3 -> I4O9 + 9O2}}}

The compound can also be obtained by heating iodic acid in phosphoric acid.

{\ displaystyle {\ ce {8 HIO3 -> 2 I4O9 + 4 H2O + O2}}}

Tetraiodonona oxide is a light yellow, hygroscopic solid that disintegrates when heated to over 75 ° C.

{\ displaystyle {\ ce {4 I4O9 -> 6 I2O5 + 2 I2 + 3 O2}}}

Similar to diiodine tetraoxide, the compound is to be regarded as iodine (III) iodate (V) I (IO ₃ ) ₃ and reacts with alkaline solutions to form iodate and iodide .

{\ displaystyle {\ ce {3 I4O9 + 12 OH- -> I- + 11 IO3- + 6 H2O}}}

.

The compound reacts with water to release iodine.

{\ displaystyle {\ ce {4I4O9 + 9H2O -> 18HIO3 + I2}}}

^ ^A ^b Dale L. Perry: Handbook of Inorganic Compounds . CRC Press, 2016, ISBN 978-1-4398-1462-8 , pp. 500 ( limited preview in Google Book Search).
↑ This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.
↑ ^a ^b ^c A. F. Holleman: Textbook of inorganic chemistry . Walter de Gruyter GmbH & Co KG, 2019, ISBN 978-3-11-083817-6 , pp. 443 ( limited preview in Google Book search).
^ ^A ^b Rajni Garg, Randhir Singh: Inorganic Chemistry . 2015, ISBN 978-1-259-06285-8 ( limited preview in Google Book Search).
↑ Georg Brauer: Handbook of Preparative Inorganic Chemistry . Elsevier, 2012, ISBN 978-0-323-16127-5 , pp. 331 ( limited preview in Google Book search).