Iodine oxides are binary chemical compounds of iodine and oxygen . Only some of the theoretically possible iodine oxides were isolated in pure form. A number of compounds, probably iodine oxides, have been detected in the atmosphere; these compounds are considered an important factor in the exchange of iodine between the ocean and the atmosphere [1] .
| Molecular formula | I 2 O | IO [3] | IO 2 | I 2 O 4 | I 2 O 5 | I 4 O 9 |
|---|---|---|---|---|---|---|
| Title | diiod monoxide | iodine monoxide | iodine dioxide | diiod tetraoxide | diiod pentoxide | tetraiodo monoxide |
| Structural formula | I 2 O | IO | IO 2 | (IO 2 ) 2 | O (IO 2 ) 2 | I (OIO 2 ) 3 |
| CAS Registration Number | 39319-71-6 | 14696-98-1 | 13494-92-3 | 1024652-24-1 | 12029-98-0 | 66523-94-2 |
| Condition at nu | Unknown | purple gas | tv, yellow | tv, yellow | white crystals | tv., dark yellow |
| Oxidation state | +1 | +2 | +4 | +3 and +5 | +5 | +3 and +5 |
| Melting temperature | Unknown | Unknown | Unknown | Dec. 100 ° C | Dec. 300-350 ° C | Dec. 75 ° C |
| Density , g / cm 3 | 4.2 | 4.8 | ||||
| Solubility in water | reaction. with arr. HIO 3 + I 2 | 187 g / 100 ml | reaction. with arr. HIO 3 + I 2 |
Diode monoxide was not experimentally observed, it was studied theoretically [4] , however, there are indications of the possibility of its synthesis in the same way that dichloro monoxide is synthesized in the reaction of mercury (II) oxide HgO with elemental iodine I 2 [5] . This compound is extremely unstable, but can halogen alkenes [6] .
Iodine dioxide (IO 2 ) and diiodine tetraoxide ((IO 2 ) 2 ), as well as the free radical iodine monoxide (IO) are involved in important processes in atmospheric chemistry. They are formed in very small amounts on the surface of the seas during photooxidation of diiodomethane produced by seaweeds [7] . Despite low concentrations (of the order of trillion -1 ), they are considered active catalysts for the destruction of ozone [8] [9] .
Diiodo pentoxide (I 2 O 5 ) is iodic acid anhydride (HIO 3 ) and the only stable iodine anhydride.
Tetraiodonoxide (I 4 O 9 or I (IO 3 ) 3 ) was synthesized in the gas-phase reaction of I 2 with O 3 [10] . It can be considered as iodate (V) iodine (III).
See also
- Oxygen fluoride
- Chlorine oxide
- Bromine oxide
Notes
- ↑ Kaltsoyannis Nikolas, Plane John MC Quantum chemical calculations on a selection of iodine-containing species (IO, OIO, INO3, (IO) 2, I2O3, I2O4 and I2O5) of importance in the atmosphere // Physical Chemistry Chemical Physics : journal. - 2008 .-- Vol. 10 , no. 13 . - P. 1723 . - DOI : 10.1039 / B715687C .
- ↑ CRC Handbook of Chemistry and Physics / DR Lide (Ed.). - 90th edition. - CRC Press; Taylor and Francis, 2009 .-- 2828 p. - ISBN 1420090844 .
- ↑ Nikitin I V. Halogen monoxides (Russian) // Advances in Chemistry . - Russian Academy of Sciences , 2008. - T. 77 , No. 8 . - S. 739-749 . - DOI : 10.1070 / RC2008v077n08ABEH003788 .
- ↑ Novak Igor. Theoretical study of I2O (neopr.) // Heteroatom Chemistry. - 1998. - T. 9 , No. 4 . - S. 383-385 . - DOI : 10.1002 / (SICI) 1098-1071 (1998) 9: 4 <383 :: AID-HC6> 3.0.CO; 2-9 .
- ↑ Forbes CP, Goosen A., Laue HAH Hypoiodite reaction: kinetic study of the reaction of 1,1-diphenyl-ethylene with mercury (II) oxide iodine (Eng.) // Journal of the Chemical Society : journal. - Chemical Society , 1974. - P. 2350 . - DOI : 10.1039 / P19740002350 .
- ↑ Cambie RC et al. Reactions of iodine oxide with alkenes (English) // Journal of the Chemical Society : journal. - Chemical Society , 1976. - No. 18 . - P. 1961 . - DOI : 10.1039 / P19760001961 .
- ↑ Hoffmann T., O'Dowd CD Seinfeld JH Iodine oxide homogeneous nucleation: An explanation for coastal new particle production (Eng.) // Geophysical Research Letters : journal. - 2001. - Vol. 28 , no. 10 . - P. 1949-1952 . - DOI : 10.1029 / 2000GL012399 .
- ↑ Saiz-Lopez A. et al. Iodine chemistry in the troposphere and its effect on ozone (English) // Atmospheric Chemistry and Physics : journal. - 2014 .-- Vol. 14 , no. 23 . - P. 13119-13143 . - DOI : 10.5194 / acp-14-13119-2014 .
- ↑ Cox RA et al. OIO and the atmospheric cycle of iodine (Eng.) // Geophysical Research Letters : journal. - 1999. - Vol. 26 , no. 13 . - P. 1857-1860 . - DOI : 10.1029 / 1999GL900439 .
- ↑ Sunder S., Wren JC, Vikis AC Raman spectra of I 4 O 9 formed by the reaction of iodine with ozone (Eng.) // Journal of Raman Spectroscopy : journal. - 1985. - Vol. 16 , no. 6 . - P. 424-426 . - DOI : 10.1002 / jrs.1250160611 .