Sulfonate

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A sulfonate ion is an ion that contains the -S(=O)2-O− functional group. The general formula is RSO2O−, where R is some organic group. They are conjugate bases of sulfonic acids with formula RSO2OH.

As is common, the same term is used for compounds containing this functional group, ionic salts, or similar covalent compounds, esters.

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Examples

  • Mesylate (methanesulfonate) ion, CH3SO2O−
  • Triflate (trifluoromethanesulfonate) ion, CF3SO2O−
  • Tosylate (p-toluenesulfonate) ion, CH2C6H4SO2O−

The preceding terms apply to salts and esters as well as anions.

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