Problem: 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. 3.4F. 4.4        G. 4.6         H. 5.8           I. 7.2           J. None of these

FREE Expert Solution
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FREE Expert Solution

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.


91% (499 ratings)
Problem Details

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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Based on our data, we think this problem is relevant for Professor Arrey's class at Capital University.