Why Is the Diels-Alder Reaction Called a Thermal [4+2] Cycloaddition

question 52

Multiple Choice

Why is the Diels-Alder reaction called a thermal [4+2] cycloaddition?

• A)Because the reaction is initiated by heat; the diene has four p electrons and the dienophile has two p electrons.
• B)Because the reaction is initiated by light; the diene has four p electrons and the dienophile has two p electrons.
• C)Because the reaction is initiated by heat; the dienophile has four p electrons and the diene has two p electrons.
• D)Because the reaction is initiated by light; the dienophile has four p electrons and the diene has two p electrons.

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Definitions:

Auricle

Another term for the outer part of the ear; it helps in directing sound waves into the ear canal.

Trauma

A deeply distressing or disturbing experience, which can be physical or psychological in nature.

Drainage

The removal or withdrawal of fluid, such as water or pus, from a particular area of the body, often using surgical or medical techniques.

Otitis Media

An infection of the middle ear, characterized by the accumulation of fluid and often causing ear pain and fevers, particularly common in children.