Under Thermal Conditions,(2E,4E)-Hexadiene Undergoes a ________ Ring Closure to Yield

question 68

Multiple Choice

Under thermal conditions,(2E,4E) -hexadiene undergoes a ________ ring closure to yield ________.

• A)conrotatory,cis-3,4-dimethylcyclobutene
• B)conrotatory,trans-3,4-dimethylcyclobutene
• C)disrotatory,cis-3,4-dimethylcyclobutene
• D)disrotatory,trans-3,4-dimethylcyclobutene

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Definitions:

Quartet

In nuclear magnetic resonance (NMR) spectroscopy, a signal that is split into four distinct peaks, indicating the presence of three equivalent protons in the neighboring environment.

Doublet

A pattern in spectroscopy indicating two adjacent peaks, often associated with the spin of a nucleus affecting a neighboring nucleus.

NMR Spectrum

A representation of the nuclear magnetic resonance absorption by nuclei in a sample.

Isobutyl Acetate

An organic compound and ester formed from the reaction of isobutanol with acetic acid, commonly used as a solvent and in flavorings.