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

Consider the hydrogenation reaction of each compound listed and rank the compounds in order of increasing ΔH° of this reaction. The most negative ΔH° should be listed first. 2,5-dimethyl-1,3-cycloheptadiene, 1,4-dimethyl-1,3-cycloheptadiene, and 3,6-dimethyl-1,4-cycloheptadiene

What descriptive term is applied to the type of diene represented by 2,4-hexadiene?

What diene and dienophile would react to give the product below?

Provide the major organic product of the following reaction.

What diene and dienophile would react to give the product below?

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

Provide the major organic product of the following reaction.

In a Diels-Alder reaction, what is the endo rule?

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

When 3-bromobut-1-ene is heated in a good ionizing solvent, reactions occur through a carbocation intermediate. Draw all reasonable resonance contributors of this cation and indicate which is the major contributor.