Consider the following:

Determine the total strain value of the eclipsed conformation.

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-dibromoethane

Note: 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.

Determine the energy difference (in kJ/mol) between the most stable eclipsed conformer and the most stable staggered conformer for 1,2-dibromoethane.

Note: 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 the gauche conformer.

Starting with the least stable conformer, draw an appropriate potential energy diagram for rotation about the C−C bond of 1,2-dibromoethane through 360º if a gauche conformer of 1,2-dibromoethane has two energy barriers, 5.4 kcal/mol and 9.5 kcal/mol, and the anti conformer is more stable than a gauche conformer by 1.4 kcal/mol.