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4-[2-(4-Meth-oxy-phen-yl)eth-yl]-3-(thio-phen-2-ylmeth-yl)-1H-1,2,4-triazol-5(4H)-one monohydrate

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    Like water, alcohols are weak acids and bases. This is attributed to the polarization of the O–H bond making the hydrogen partially positive. Moreover, the electron pairs on the oxygen atom of alcohol make it both basic and nucleophilic. Protonation of an alcohol converts hydroxide, a poor leaving group, into water—a good one. The two acid–base equilibria corresponding to ethanol are depicted below.