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Consider a Newman Projection for 2,2,3-trimethylbutane. Which of the following is true?

A. The least stable conformation of the molecule has 22 kJ/mol of strain energy.
B. The most stable conformation of the molecule has no torsional strain interactions.
C. The least stable conformation has 28 kJ/mol of torsional strain energy.
D. The most stable conformation of the molecule has two gauche butane interactions with 7.6 kJ/mol of strain energy.

Answer :

Final answer:

The most stable conformation of 2.2,3-trimethylbutane in a Newman projection has no torsional strain interactions.

Explanation:

In a Newman projection for 2.2,3-trimethylbutane, we are analyzing the stability and strain energy of different conformations of the molecule. Let's evaluate each statement:

  1. The least stable conformation of the molecule has 22 kJ/mol of strain energy.
  2. The most stable conformation of the molecule has no torsional strain interactions.
  3. The least stable conformation has 28 kJ/mol of torsional strain energy.
  4. The most stable conformation of the molecule has two gauche butane interactions with 7.6 kJ/mol of strain energy.

Based on the fact that the most stable conformation of a molecule has the lowest energy and the least amount of strain, we can conclude that the statement 'The most stable conformation of the molecule has no torsional strain interactions' is true. This conformation would have the lowest torsional strain energy and would be the most stable.

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