Among the following structures, which will show the most stable enamine formation? (Where Me is - CH 3 )

Step-by-step solution

All these enamines are interconvertible through their resonating structures. So most stable form is ‘C’ due to steric factor. All of these has the equal resonance only differ in their geometrical configuration. The enamine in option C has bulky groups on opposite side of double bond. means they have the minimum repulsion between them.