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Butanenitrile can be prepared by heating...

Butanenitrile can be prepared by heating_____with alcoholic KCN.

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n-Propyl bromide, `underset("n-Propyl bromide")(CH_(3)CH_(2)CH_(2)-Br)+KCN(alc) overset(Delta)to underset("Butanenitrile")(CH_(3)CH_(2)CH_(2)CN)+KBr`
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