Exam 15: Conjugated Systems, Orbital Symmetry, and Ultraviolet Spectroscopy

Name the two major products which are formed when 3-bromo-1-methylcyclohexene undergoes solvolysis in hot methanol.

Provide the major organic product of the following reaction.

Which compound requires a higher energy photon to cause a p to p^* (HOMO/LUMO) transition, 1,3-butadiene or 1,3,5-hexatriene?

Rank the following dienes in order of increasing stability: trans-1,3-pentadiene, cis-1,3-pentadiene, 1,4-pentadiene, and 1,2-pentadiene.

Draw the HOMO of allyl anion.

Provide the major organic product of the following reaction.

Draw (E)-1,3-hexadiene in its s-cis conformation.

Provide the structure of the major organic product in the following reaction.

Draw the resonance structures of the intermediate and then predict the two major products in the following reaction.

Among a series of isomeric trienes, the more negative the ΔH° of the hydrogenation reaction of a given triene, the ________ stable it is relative to the others in the isomeric series.