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Ch. 11 - Properties and Synthesis of Alkyl Halides: Radical Reactions
Mullins - Organic Chemistry: A Learner Centered Approach 1st Edition
Mullins1st EditionOrganic Chemistry: A Learner Centered ApproachISBN: 9780137566471당신이 사용하는 게 아니라요?교과서 변경
모든 교과서Mullins 1st EditionCh. 11 - Properties and Synthesis of Alkyl Halides: Radical Reactions문제 30c
10장, 문제 30c

In the following molecules, identify the carbon where the radical is most likely to form in the first propagation step.
(c) Chemical structure of a cyclohexene ring with methyl groups at positions 1 and 3, and a double bond between positions 2 and 3.

검증된 단계별 안내
1
Identify the structure of the molecule given in part (c). Look for any functional groups or structural features that might influence radical formation.
Consider the stability of radicals. Radicals are more stable on tertiary carbons compared to secondary or primary carbons due to hyperconjugation and the inductive effect.
Examine the molecule for resonance stabilization. Radicals that can be stabilized by resonance are more likely to form. Look for allylic or benzylic positions where resonance can occur.
Evaluate the steric hindrance around potential radical sites. Less sterically hindered sites are more favorable for radical formation.
Determine the most likely carbon for radical formation by combining the factors of stability, resonance, and steric effects. This carbon will be the site where the radical is most likely to form in the first propagation step.

비슷한 문제에 대한 검증된 영상 답변:

이 영상 해법은 위 문제에 도움이 된다고 튜터들이 추천한 것입니다.
영상 길이:
3m

주요 개념

질문에 올바르게 답하기 위해 반드시 이해해야 하는 핵심 개념들은 다음과 같습니다.

Radical Stability

Radical stability is crucial in determining where a radical is most likely to form. Radicals are more stable when they are tertiary, secondary, or allylic due to hyperconjugation and resonance effects. The stability of a radical influences its formation during chemical reactions, particularly in propagation steps.
추천 영상:
03:43
The radical stability trend.

Propagation Step in Radical Reactions

The propagation step in radical reactions involves the transfer of a radical from one molecule to another, continuing the chain reaction. This step is essential for the progression of radical reactions, where the most stable radical formation is favored to ensure the reaction proceeds efficiently.
추천 영상:
12:11
Radical Chain Reaction Mechanism.

Hyperconjugation

Hyperconjugation is a stabilizing interaction that occurs when electrons in sigma bonds (typically C-H or C-C) delocalize into an adjacent empty or partially filled p-orbital or pi-system. This effect increases the stability of radicals, particularly in tertiary carbons, by dispersing electron density and reducing energy.
추천 영상:
04:28
Understanding trends of alkene stability.
관련 실천
교과서 질문

Identify the allylic carbon(s) in the following molecules.

(c)

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교과서 질문

In the following allylic radicals, identify the carbon where the new C― Br bond is most likely to form in the second propagation step.

(b)

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교과서 질문

In the following molecules, identify the carbon where the radical is most likely to form in the first propagation step.

(d)

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교과서 질문

In the following reaction, which C―H bond would be most likely to react with a bromine radical?

1101
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교과서 질문

In the following allylic radicals, identify the carbon where the new C–Br bond is most likely to form in the second propagation step.

(a)

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교과서 질문

We show in Chapter 12 that C― Br bonds can break to give a carbocation and a bromide anion. For which of the organohalides (A or B) would you expect this process to be fastest? Explain.

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