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Which of the following statements is correct for alkyl halide?
- a)Alkyl halide will always show SN1 mechanism
- b)As branching at carbon increases, E1 mechanism is favoured as compared to SN1 mechanism
- c)In unimolecular reaction, increasing the temperature donot favours E1 mechanism
- d)In most unimolecular reactions of alkyl halide E1 reaction is favoured over SN1 reaction
Correct answer is option 'B'. Can you explain this answer?
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Which of the following statements is correct for alkyl halide?a)Alkyl ...
In most unimolecular reactions of alkyl halide SN1 reaction is favoured over E1 reaction. E1 mechanism is favoured as compared to SN1 mechanism by branching at carbon increases, as more steric hinderence at the attacking site will leads to E1 mechanism.
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Community Answer
Which of the following statements is correct for alkyl halide?a)Alkyl ...
Explanation:
Alkyl Halides:
Alkyl halides are organic compounds that contain a halogen atom bonded to an alkyl group. The general formula for alkyl halides is R-X, where R represents an alkyl group and X represents a halogen atom (such as Cl, Br, or I).
SN1 Mechanism:
The SN1 mechanism is a nucleophilic substitution reaction in which the rate-determining step involves the formation of a carbocation intermediate. In this mechanism, the leaving group (X) leaves first, creating a positively charged carbon atom. Then, the nucleophile attacks the carbocation to form the substitution product.
E1 Mechanism:
The E1 mechanism is an elimination reaction in which the rate-determining step involves the formation of a carbocation intermediate. In this mechanism, the leaving group (X) leaves first, creating a positively charged carbon atom. Then, a base abstracts a proton from an adjacent carbon atom, resulting in the formation of a double bond and the elimination of a leaving group.
Effect of Branching on SN1 and E1 Mechanisms:
As the branching at the carbon atom increases, the stability of the carbocation intermediate also increases. This is because branching increases the number of adjacent carbon atoms, which can stabilize the positive charge by electron donation through hyperconjugation. Therefore, as branching increases, the E1 mechanism is favored over the SN1 mechanism.
Unimolecular Reactions and Temperature:
Unimolecular reactions involve the breaking of a single bond and the formation of new bonds in a single step. In the case of alkyl halides, unimolecular reactions can proceed via the SN1 or E1 mechanism.
Increasing the temperature generally favors the E1 mechanism over the SN1 mechanism in unimolecular reactions. This is because the E1 mechanism involves the elimination of a leaving group and the formation of a double bond, which is an exothermic process. Increasing the temperature provides the necessary energy for this process to occur more readily.
Correct Answer:
Option B is correct: As branching at carbon increases, the E1 mechanism is favored as compared to the SN1 mechanism. This is due to the increased stability of the carbocation intermediate in the presence of branching.
Alkyl Halides:
Alkyl halides are organic compounds that contain a halogen atom bonded to an alkyl group. The general formula for alkyl halides is R-X, where R represents an alkyl group and X represents a halogen atom (such as Cl, Br, or I).
SN1 Mechanism:
The SN1 mechanism is a nucleophilic substitution reaction in which the rate-determining step involves the formation of a carbocation intermediate. In this mechanism, the leaving group (X) leaves first, creating a positively charged carbon atom. Then, the nucleophile attacks the carbocation to form the substitution product.
E1 Mechanism:
The E1 mechanism is an elimination reaction in which the rate-determining step involves the formation of a carbocation intermediate. In this mechanism, the leaving group (X) leaves first, creating a positively charged carbon atom. Then, a base abstracts a proton from an adjacent carbon atom, resulting in the formation of a double bond and the elimination of a leaving group.
Effect of Branching on SN1 and E1 Mechanisms:
As the branching at the carbon atom increases, the stability of the carbocation intermediate also increases. This is because branching increases the number of adjacent carbon atoms, which can stabilize the positive charge by electron donation through hyperconjugation. Therefore, as branching increases, the E1 mechanism is favored over the SN1 mechanism.
Unimolecular Reactions and Temperature:
Unimolecular reactions involve the breaking of a single bond and the formation of new bonds in a single step. In the case of alkyl halides, unimolecular reactions can proceed via the SN1 or E1 mechanism.
Increasing the temperature generally favors the E1 mechanism over the SN1 mechanism in unimolecular reactions. This is because the E1 mechanism involves the elimination of a leaving group and the formation of a double bond, which is an exothermic process. Increasing the temperature provides the necessary energy for this process to occur more readily.
Correct Answer:
Option B is correct: As branching at carbon increases, the E1 mechanism is favored as compared to the SN1 mechanism. This is due to the increased stability of the carbocation intermediate in the presence of branching.
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Which of the following statements is correct for alkyl halide?a)Alkyl halide will always show SN1 mechanismb)As branching at carbon increases, E1 mechanism is favoured as compared to SN1 mechanismc)In unimolecular reaction, increasing the temperature donot favours E1 mechanismd)In most unimolecular reactions of alkyl halide E1 reaction is favoured over SN1 reactionCorrect answer is option 'B'. Can you explain this answer?
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Which of the following statements is correct for alkyl halide?a)Alkyl halide will always show SN1 mechanismb)As branching at carbon increases, E1 mechanism is favoured as compared to SN1 mechanismc)In unimolecular reaction, increasing the temperature donot favours E1 mechanismd)In most unimolecular reactions of alkyl halide E1 reaction is favoured over SN1 reactionCorrect answer is option 'B'. Can you explain this answer? for Chemistry 2024 is part of Chemistry preparation. The Question and answers have been prepared according to the Chemistry exam syllabus. Information about Which of the following statements is correct for alkyl halide?a)Alkyl halide will always show SN1 mechanismb)As branching at carbon increases, E1 mechanism is favoured as compared to SN1 mechanismc)In unimolecular reaction, increasing the temperature donot favours E1 mechanismd)In most unimolecular reactions of alkyl halide E1 reaction is favoured over SN1 reactionCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for Chemistry 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following statements is correct for alkyl halide?a)Alkyl halide will always show SN1 mechanismb)As branching at carbon increases, E1 mechanism is favoured as compared to SN1 mechanismc)In unimolecular reaction, increasing the temperature donot favours E1 mechanismd)In most unimolecular reactions of alkyl halide E1 reaction is favoured over SN1 reactionCorrect answer is option 'B'. Can you explain this answer?.
Which of the following statements is correct for alkyl halide?a)Alkyl halide will always show SN1 mechanismb)As branching at carbon increases, E1 mechanism is favoured as compared to SN1 mechanismc)In unimolecular reaction, increasing the temperature donot favours E1 mechanismd)In most unimolecular reactions of alkyl halide E1 reaction is favoured over SN1 reactionCorrect answer is option 'B'. Can you explain this answer? for Chemistry 2024 is part of Chemistry preparation. The Question and answers have been prepared according to the Chemistry exam syllabus. Information about Which of the following statements is correct for alkyl halide?a)Alkyl halide will always show SN1 mechanismb)As branching at carbon increases, E1 mechanism is favoured as compared to SN1 mechanismc)In unimolecular reaction, increasing the temperature donot favours E1 mechanismd)In most unimolecular reactions of alkyl halide E1 reaction is favoured over SN1 reactionCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for Chemistry 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following statements is correct for alkyl halide?a)Alkyl halide will always show SN1 mechanismb)As branching at carbon increases, E1 mechanism is favoured as compared to SN1 mechanismc)In unimolecular reaction, increasing the temperature donot favours E1 mechanismd)In most unimolecular reactions of alkyl halide E1 reaction is favoured over SN1 reactionCorrect answer is option 'B'. Can you explain this answer?.
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