Trimethylsulfonium iodide
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| Names | |
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| Other names
Trimesium
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3D model (JSmol)
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| ChemSpider | |
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| Properties | |
| C3H9S+ | |
| Molar mass | 77.17 g/mol |
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Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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| Infobox references | |
Trimethylsulfonium (systematically named trimethylsulfanium and trimethylsulfur(1+)) is an organic cation with the chemical formula (CH3)3S+ (also written as C
3H
9S+
). It is the simplest sulfonium cation.
Several salts of trimethylsulfonium are known:
Sulfonium compounds can be synthesised by treating a suitable alkyl halide with a thioether. For example, the reaction of dimethyl sulfide with iodomethane yields trimethylsulfonium iodide:
An extra oxygen atom can bond to the sulfur atom to yield the trimethylsulfoxonium ion.
Glyphosate herbicide is often supplied as a trimethylsulfonium salt. When mixed with aluminium bromide, or aluminium chloride or even hydrogen bromide, trimethylsulfonium bromide forms an ionic liquid, which melts at temperatures below standard conditions.
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