Methylpyridinium
Chemical compound
From Wikipedia, the free encyclopedia
Methylpyridinium is an ion with the formula C5H5NCH+3. It is the N-methylated derivative of pyridine. It confers no color to its salts. The ion is classified as a quaternary ammonium ion.[1]
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| Names | |
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| Preferred IUPAC name
1-Methylpyridin-1-ium | |
| Other names
N-Methylpyridinium | |
| Identifiers | |
3D model (JSmol) |
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PubChem CID |
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CompTox Dashboard (EPA) |
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| Properties | |
| C6H8N+ | |
| Molar mass | 94.134 g/mol |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Preparation and occurrence
Methylpyridinium is prepared by treating pyridine with dimethylsulfate:[2]
- C5H5N + (CH3O)2SO2 → [C5H5NCH3]+CH3OSO−3
It is found in some coffee products as a result of the thermal decarboxylation of trigonelline.[3]
Ionic liquid
The chloride salt of N-methylpyridinium behaves as an ionic liquid. Mixtures of that salt and zinc chloride have been characterised over the temperature range 150–200 °C (423–473 K).[4][5][6][7]
