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Dimethyl sulfite

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Dimethyl sulfite is a sulfite ester with the chemical formula (CH3O)2SO.

Contents

Dimethyl sulfite is used as an additive in some polymers to prevent oxidation. It is also a potentially useful high energy battery electrolyte solvent.

Structure and conformation

The dimethyl sulfite molecule can adopt several conformations. The most stable is the GG conformer. Each C–O bond is gauche to the S=O bond, depicted below.

Preparation

Dimethyl sulfite is prepared from thionyl chloride and methanol.

OSCl2 + 2CH3OH → OS(OCH3)2 + 2HCl

References

Dimethyl sulfite Wikipedia