Complete the reaction:
`CH_(3)-CH_(2)C-=N overset(Na(Hg) // C_(2)H_(5)OH)(to)` ?

Explanation

To complete the reaction of `CH3-CH2-C≡N` (propanenitrile) in the presence of sodium amalgam (Na(Hg)) and ethanol (C2H5OH), we will follow these steps:

### Step 1: Identify the Reactants
The reactant is propanenitrile, which has the structure `CH3-CH2-C≡N`. The presence of sodium amalgam and ethanol indicates that a reduction reaction is taking place.

### Step 2: Understand the Role of Sodium Amalgam
Sodium amalgam acts as a reducing agent in this reaction. Reducing agents typically donate electrons to other substances, leading to a reduction in oxidation state.

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