Dimethyl sulfite
| Dimethyl sulfite | |
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Methoxysulfinyloxymethane |
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Other names
Dimethyl sulphite |
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| Identifiers | |
| CAS number | 616-42-2 |
| PubChem | 69223 |
| ChemSpider | 62436  |
| EC number | 210-481-0 |
| ChEBI | CHEBI:48858 |
| Jmol-3D images | Image 1 Image 2 |
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| Properties | |
| Molecular formula | C2H6O3S |
| Molar mass | 110.088 g/mol |
| Appearance | Clear liquid |
| Density | 1.29 g/cm3 |
| Boiling point |
126 °C, 399 K, 259 °F |
 (verify) (what is:  / ?)Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) |
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| Infobox references | |
Dimethyl sulfite is a sulfite ester with the chemical formula (CH3O)2SO.
Dimethyl sulfite is used as an additive in some polymers to prevent oxidation.[2] It is also a potentially useful high energy battery electrolyte solvent.[3]
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Structure and conformation [edit]
The dimethyl sulfite molecule can adopt several conformations. The most stable is the GG conformer.[1] Each C–O bond is gauche to the S=O bond, depicted below.
Preparation [edit]
Although formally derived from sulfurous acid, dimethyl sulfite is prepared from thionyl chloride and methanol.
- OSCl2 + 2CH3OH → OS(OCH3)2 + 2HCl
See also [edit]
- Methyl methanesulfonate, a chemical with the same molecular formula but different arrangement of atoms
- Diethyl sulfite, a similar sulfite ester
- Dimethyl sulfoxide
- Dimethyl sulfate, a sulfate ester
References [edit]
- ^ a b Borba, A.; Gómez-Zavaglia, A.; Simões, P. N. N. L.; Fausto, R. (2005). "Matrix Isolation FTIR Spectroscopic and Theoretical Study of Dimethyl Sulfite". J. Phys. Chem. A 109 (16): 3578–3586. doi:10.1021/jp050020t.
- ^ Guenther, A.; Koenig, T.; Habicher, W. D.; Schwetlick, K. (1997). "Antioxidant action of organic sulfites. I. Esters of sulfurous acid as secondary antioxidants". Polymer Degradation and Stability 55 (2): 209–216. doi:10.1016/S0141-3910(96)00150-4.
- ^ N. P. Yao, E. D'Orsay, and D. N. Bennion (1968). "Behavior of Dimethyl Sulfite as a Potential Nonaqueous Battery Solvent". J. Electrochem. Soc. 115 (10): 999–1003. doi:10.1149/1.2410917.
External links [edit]
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