The first intermediate in this reaction is in the form of successive of resonance hybrids, the second of which has its central carbon deprotonated to re-form the moiety that previously attacked an amino hydrogen and the first of which sees a double-migration form an N-N double bond and break an N-C double bond. The first neutral intermediate in this reaction is a compound in which a central carbon is single-bonded to two 
The first intermediate in this reaction is in the form of successive of resonance hybrids, the second of which has its central carbon deprotonated to re-form the moiety that previously attacked an amino hydrogen and the first of which sees a double-migration form an N-N double bond and break an N-C double bond. The first neutral intermediate in this reaction is a compound in which a central carbon is single-bonded to two functional groups and double-bonded to a nitrogen single-bonded to an amine; it's thus a hydrazone. If the product of this reaction is desired from base-susceptible reactants, one can employ its acid analogue, the Clemmensen reduction. Because this reaction requires the highly dangerous heating of hydrazine, a non-volatile-solvent modification of it named for Huang and Minlon is highly preferable. For ten points, identify this reaction, the basic reduction of a ketone or aldehyde to an alkane.
The first intermediate in this reaction is in the form of successive of resonance hybrids, the second of which has its central carbon deprotonated to re-form the moiety that previously attacked an amino hydrogen and the first of which sees a double-migration form an N-N double bond and break an N-C double bond.
the {Wolff-Kishner} reduction