Identify the global minima, local minima, global maxima, and local maxima on the conformational energy diagram for (E,E)-dibenzalacetone. Explain the differences and similarities between the two minima and two maxima in terms of geometry, conjugation, and steric interactions.

Conformational Energy Diagram 43.0 33.0 Energy (kcal/mol) 23.0 13.0 -180 -135 -90 45 0 45 90 135 180 Dihedral Angle () between C1-C2-C3-C4 0 = 21.740 kcal/mol 15 (or -15) = 21.123 kcal/mol 90 (or -90) = 52.250 kcal/mol 180 (or -180) = 12.209 kcal/mol 180.00 90.00