Question

For trans-1-ethyl-4-isopropylcyclohexane, which structures represent the possible boat conformations?

Answer 1

C and D on the attached picture.

Step-by-step explanation:

Hello,

At first, it is important to remember that a cyclohexane beat conformation is a possible shape adopted by this molecule.

In this case, boat conformations are said to be in equilibrium, it means a condition at which the opposing force or influence is balanced with the conformation force. In such way, no changes are noticed as a function of time due to their stability. Thus, the two structure attaining the equilibrium are C and D (attached picture) as result of the distancing between the included radicals.

Best regards.

Answer 2

The structure of boat confirmation for any cyclohexane be like as shown in figure (1)

The two substituents are

ethyl : at 1st position

isopropyl: at fourth position

So possible combinations for structures are shown in figure (2)

So the correct answer is

figure (3)