Iodine oxide
Encyclopedia
Iodine oxides are chemical compounds of oxygen
and iodine
. There exist multiple oxides as iodine has more than one oxidation state
.
The iodine oxide free radical (IO) is a known ozone depletion
agent. Atmospheric compounds containing iodine form iodine radicals which react with ozone to form iodine oxide radicals (IO) and oxygen
. The IO radicals in turn participate in other ozone-consuming reactions. It is a purple gas.
Oxygen
Oxygen is the element with atomic number 8 and represented by the symbol O. Its name derives from the Greek roots ὀξύς and -γενής , because at the time of naming, it was mistakenly thought that all acids required oxygen in their composition...
and iodine
Iodine
Iodine is a chemical element with the symbol I and atomic number 53. The name is pronounced , , or . The name is from the , meaning violet or purple, due to the color of elemental iodine vapor....
. There exist multiple oxides as iodine has more than one oxidation state
Oxidation state
In chemistry, the oxidation state is an indicator of the degree of oxidation of an atom in a chemical compound. The formal oxidation state is the hypothetical charge that an atom would have if all bonds to atoms of different elements were 100% ionic. Oxidation states are typically represented by...
.
| |I2O4 | I2O5 | I4O9 | |
| Synonyms | diiodine tetraoxide | diiodine pentaoxide | tetraiodine nonaoxide |
| Structure Structure Structure is a fundamental, tangible or intangible notion referring to the recognition, observation, nature, and permanence of patterns and relationships of entities. This notion may itself be an object, such as a built structure, or an attribute, such as the structure of society... |
[IO]+[IO3]– | O(IO2)2 | I(OIO2)3 |
| CAS registry | 12029-98-0 | ||
| Appearance Visual appearance The visual appearance of objects is given by the way in which they reflect and transmit light. The color of objects is determined by the parts of the spectrum of light that are reflected or transmitted without being absorbed... |
yellow solid | white crystalline solid | dark yellow solid |
| Oxidation state Oxidation state In chemistry, the oxidation state is an indicator of the degree of oxidation of an atom in a chemical compound. The formal oxidation state is the hypothetical charge that an atom would have if all bonds to atoms of different elements were 100% ionic. Oxidation states are typically represented by... |
|||
| Melting point Melting point The melting point of a solid is the temperature at which it changes state from solid to liquid. At the melting point the solid and liquid phase exist in equilibrium. The melting point of a substance depends on pressure and is usually specified at standard atmospheric pressure... |
decomp. 100 °C | decomp. 300–350 °C | decomp. 75 °C |
| Specific gravity Specific gravity Specific gravity is the ratio of the density of a substance to the density of a reference substance. Apparent specific gravity is the ratio of the weight of a volume of the substance to the weight of an equal volume of the reference substance. The reference substance is nearly always water for... |
4.2 | 4.8 | |
| Solubility Solubility Solubility is the property of a solid, liquid, or gaseous chemical substance called solute to dissolve in a solid, liquid, or gaseous solvent to form a homogeneous solution of the solute in the solvent. The solubility of a substance fundamentally depends on the used solvent as well as on... water Water Water is a chemical substance with the chemical formula H2O. A water molecule contains one oxygen and two hydrogen atoms connected by covalent bonds. Water is a liquid at ambient conditions, but it often co-exists on Earth with its solid state, ice, and gaseous state . Water also exists in a... |
decomp. to HIO3 + I2 | 187 g/100 ml | decomp. to HIO3 + I2 |
| Iodine oxides | |||
The iodine oxide free radical (IO) is a known ozone depletion
Ozone depletion
Ozone depletion describes two distinct but related phenomena observed since the late 1970s: a steady decline of about 4% per decade in the total volume of ozone in Earth's stratosphere , and a much larger springtime decrease in stratospheric ozone over Earth's polar regions. The latter phenomenon...
agent. Atmospheric compounds containing iodine form iodine radicals which react with ozone to form iodine oxide radicals (IO) and oxygen
Oxygen
Oxygen is the element with atomic number 8 and represented by the symbol O. Its name derives from the Greek roots ὀξύς and -γενής , because at the time of naming, it was mistakenly thought that all acids required oxygen in their composition...
. The IO radicals in turn participate in other ozone-consuming reactions. It is a purple gas.
See also
- Iodine pentoxideIodine pentoxideIodine pentoxide is the chemical compound with the formula I2O5. This iodine oxide is the anhydride of iodic acid. It is produced by dehydrating iodic acid at 200 °C in a stream of dry air:- Structure :...
- Other compounds of iodine with elements in the periodic tablePeriodic tableThe periodic table of the chemical elements is a tabular display of the 118 known chemical elements organized by selected properties of their atomic structures. Elements are presented by increasing atomic number, the number of protons in an atom's atomic nucleus...
: