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![[Post New]](/templates/default/images/icon_minipost_new.gif) 7 Dec 2007 11:59:30 IST
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A polar protic solvent is one that contains an O-H or N-H bond. A polar aprotic solvent is one that does not contain an O-H or N-H bond. Water (H-O-H) or acetic acid (CH3-C(=O)OH) are representative polar protic solvents.
A polar aprotic solvent is acetone (CH3-C(=O)-CH3).
In chemical reactions the use of polar protic solvents favors the SN1 reaction mechanism, while polar aprotic solvents favor the SN2 reaction mechanism.
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