Multiple Choice
Which of the following is an enzyme that breaks down starch?
3. Acids and Bases
Organic Chemistry Reactions
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Which of the following statements is not true regarding the Diels-Alder reaction?
A
The reaction requires a catalyst to proceed.
B
The Diels-Alder reaction is a [4+2] cycloaddition reaction.
C
The reaction involves a diene and a dienophile.
D
The Diels-Alder reaction is stereospecific.
Verified step by step guidance1
Understand the Diels-Alder reaction: It is a [4+2] cycloaddition reaction, meaning it involves the interaction of a conjugated diene (4 π-electrons) and a dienophile (2 π-electrons) to form a six-membered ring.
Recognize that the Diels-Alder reaction is a pericyclic reaction, which typically does not require a catalyst. It proceeds through a concerted mechanism where bonds are formed simultaneously.
Identify the stereospecific nature of the Diels-Alder reaction: The stereochemistry of the diene and dienophile is preserved in the product, meaning that the reaction is stereospecific.
Evaluate each statement given in the problem: Determine which statement contradicts the known characteristics of the Diels-Alder reaction.
Conclude that the statement 'The reaction requires a catalyst to proceed' is not true, as the Diels-Alder reaction generally occurs without the need for a catalyst.
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