Polar aprotic solvents

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A polar aprotic solvent is a solvent that lacks an acidic proton and is polar. Such solvents lack hydroxyl and amine groups. These solvents do not serve as proton donors in hydrogen bonding, although they can be proton acceptors. Many solvents, including chlorocarbons and hydrocarbons, are classifiable as aprotic, but polar aprotic solvents are of particular interest for their ability to dissolve salts.

Solvent Chemical formula Boiling point Dielectric constant Density Dipole moment (D)

Polar protic solvents
acetonitrile CH3CN 81.3 - 82.1 °C 38.3
dimethylformamide (CH3)2NCHO 153 °C 0.95 g/cm3 3.86
dimethylsulfoxide (CH3)2SO 189 °C 1.1 g/cm3 3.96
tetrahydrofuran C4H8O 66 °C 7.6 0.887 g/cm3