Question

The structure of 2,3-dimethylbutane is shown in the figure. Draw a graph of approximate energy vs. the H–C–C–H dihedral angle for this compound as it rotates along the central C–C bond. The first column should show the energy of the conformer with an H–C–C–H dihedral angle of 0°, the second with a dihedral angle of 60°, etc. I have provided a table of energies of different interactions for your convenience.

Interaction	Cost in kcal/mol
CH3–CH3 anti	0.0
CH3–CH3 gauche	0.9
H–H eclipse	0.9
CH3–H eclipse	1.7
CH3–CH3 eclipse	4.4

Practice exam 2-not for credit! Maximum allowed tries per question: Unlimited (12) [5 points] The structure of 2,3-dimethylbutane is shown in the figure. Draw a graph of approximate energy vs. the H-C-C-H dihedral angle for this compound as it rotates along the central C-C bond. The first column should show the energy of the conformer with an H-C-C-H dihedral angle of 0, the second with a dihedral angle of 60°, etc. I have provided a table of energies of different interactions for your convenience. Interaction CH3-CH3 anti CH3-CH3 gauche H-H eclipse CH3-H eclipse CH3-CH3 eclipse Cost in kca/mol 0.0 0.9 0.9 1.7 4.4 Click on the table to add an energy state. Click to choose a state to delete, move, or connect to another energy state click on an empty cell to move the state there, or click. next to a second state to connect them with a line or to remove an existing line between them Launch Marvin iew™ or click image to copy source Refresh Delete HC CH3 Submit Response