Determine the energy difference (in kJ/mol) between the least stable staggered conformer and the least stable eclipsed conformer for the compound given below.
1,2-dibromoethaneNote: A gauche conformer has two energy barriers, 22.6 kJ/mol and 39.7 kJ/mol. The anti conformer is 5.86 kJ/mol more stable than a gauche conformer.

• A. 5.86 kJ/mol
• B. 22.6 kJ/mol
• C. 39.7 kJ/mol
• D. 45.6 kJ/mol

Answer: (C)