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In a Diels–Alder reaction, the most reactive diene amongst the following is:
- a)(4E)–1, 4–hexadiene.
- b)(4Z)–1, 4–hexadiene.
- c)(2E, 4E)–2, 4–hexadiene.
- d)(2Z, 4Z)–2, 4–hexadiene.
Correct answer is option 'C'. Can you explain this answer?
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In a Diels–Alder reaction, the most reactive diene amongst the f...
Most Reactive Diene in Diels-Alder Reaction
In a Diels-Alder reaction, the most reactive diene is the one that can easily form a cyclic transition state with the dienophile. Let's analyze the given options to find out the most reactive diene.
a) (4E)-1,4-hexadiene
This diene has a trans-configuration, which means that the two double bonds are on opposite sides of the molecule. It can form a cyclic transition state with a dienophile, but the reaction may be hindered due to the trans-configuration.
b) (4Z)-1,4-hexadiene
This diene has a cis-configuration, which means that the two double bonds are on the same side of the molecule. It can easily form a cyclic transition state with a dienophile, but it may not be the most reactive due to steric hindrance.
c) (2E,4E)-2,4-hexadiene
This diene has two trans-double bonds, which means that they are on opposite sides of the molecule. It can easily form a cyclic transition state with a dienophile, and it is the most reactive diene because it has the least steric hindrance.
d) (2Z,4Z)-2,4-hexadiene
This diene has two cis-double bonds, which means that they are on the same side of the molecule. It can form a cyclic transition state with a dienophile, but it may not be the most reactive due to steric hindrance.
Therefore, the correct answer is option C, (2E,4E)-2,4-hexadiene, which is the most reactive diene in a Diels-Alder reaction.
In a Diels-Alder reaction, the most reactive diene is the one that can easily form a cyclic transition state with the dienophile. Let's analyze the given options to find out the most reactive diene.
a) (4E)-1,4-hexadiene
This diene has a trans-configuration, which means that the two double bonds are on opposite sides of the molecule. It can form a cyclic transition state with a dienophile, but the reaction may be hindered due to the trans-configuration.
b) (4Z)-1,4-hexadiene
This diene has a cis-configuration, which means that the two double bonds are on the same side of the molecule. It can easily form a cyclic transition state with a dienophile, but it may not be the most reactive due to steric hindrance.
c) (2E,4E)-2,4-hexadiene
This diene has two trans-double bonds, which means that they are on opposite sides of the molecule. It can easily form a cyclic transition state with a dienophile, and it is the most reactive diene because it has the least steric hindrance.
d) (2Z,4Z)-2,4-hexadiene
This diene has two cis-double bonds, which means that they are on the same side of the molecule. It can form a cyclic transition state with a dienophile, but it may not be the most reactive due to steric hindrance.
Therefore, the correct answer is option C, (2E,4E)-2,4-hexadiene, which is the most reactive diene in a Diels-Alder reaction.
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In a Diels–Alder reaction, the most reactive diene amongst the following is:a)(4E)–1, 4–hexadiene.b)(4Z)–1, 4–hexadiene.c)(2E, 4E)–2, 4–hexadiene.d)(2Z, 4Z)–2, 4–hexadiene.Correct answer is option 'C'. Can you explain this answer?
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