We’re being asked to calculate the total strain energy (in kcal/mol) for the least stable conformation of 2-methylbutane.
Recall that strain energy is the energy a compound needs to overcome to change from one conformation to the other. It is the sum of the steric interactions present in a Newman projection.
For this problem, we need to do the following steps:
Step 1: Draw the Newman projection for the given structure.
Step 2: Identify the steric interactions and calculate the total strain energy.
What is the total strain energy (in kcal/mol) of the least stable (highest energy) conformation possible for 2-methylbutane? All of the choices below are expressed in units of kcal/mol.
A. 0 B. 0.9 C. 1.8 D. 2.7 E. 3.4
F. 4.4 G. 4.6 H. 5.8 I. 7.2 J. None of these
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