Question

Choose the eclipsed conformations from among the following.

• A.
• B.
• C.
• D.

Answer 1

Answer: (A), (B), (C), (D)

Eclipsed conformations are those in which the torsional angles between the substituents on adjacent atoms joined by a single bond is $0^o$

This means that the substituents completely overlap on another when observed in Newman or sawhorse projections.

In the options gives, we observe that all newman and sawhorse projections are in eclipsed state.

Considering the boat conformation of cyclohexane, recall that boat conformation is a fully eclipsed conformation of cyclohexane. Here is the newman projection of boat conformation for reference.