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Ch.6 - Alkyl Halides; Nucleophilic Substitution
Wade - Organic Chemistry 9th Edition
Wade9th EditionOrganic ChemistryISBN: 9780135213728당신이 사용하는 게 아니라요?교과서 변경
모든 교과서Wade 9th EditionCh.6 - Alkyl Halides; Nucleophilic Substitution문제 20c,d
6장, 문제 20c,d

Draw a perspective structure or a Fischer projection for the products of the following SN2 reactions.
(c) Structural representation of an SN2 reaction showing reactants and product, including a brominated compound and sodium iodide.
(d) Structural representation of an SN2 reaction showing reactants and a sodium hydrosulfide reagent.

검증된 단계별 안내
1
Step 1: Identify the reaction type. Both reactions are SN2 reactions, which involve a backside attack by the nucleophile and inversion of stereochemistry at the carbon center where substitution occurs.
Step 2: Analyze the first reaction. The substrate is a brominated compound in a Fischer projection. The nucleophile is iodide (I⁻), and the solvent is acetone, which is polar aprotic and favors SN2 reactions. The iodide will replace the bromine via backside attack, leading to inversion of stereochemistry at the carbon center.
Step 3: Draw the product for the first reaction. Replace the bromine atom with iodine, ensuring the stereochemistry is inverted. In a Fischer projection, inversion means swapping the positions of the groups attached to the carbon center where substitution occurs.
Step 4: Analyze the second reaction. The substrate is a brominated compound in a perspective structure. The nucleophile is the thiolate ion (SH⁻), which will replace the bromine via backside attack. Again, inversion of stereochemistry occurs at the carbon center.
Step 5: Draw the product for the second reaction. Replace the bromine atom with the SH group, ensuring the stereochemistry is inverted. In a perspective structure, inversion means flipping the wedge and dash positions of the substituents at the carbon center where substitution occurs.

비슷한 문제에 대한 검증된 영상 답변:

이 영상 해법은 위 문제에 도움이 된다고 튜터들이 추천한 것입니다.
영상 길이:
1m

주요 개념

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

S<sub>N</sub>2 Mechanism

The S<sub>N</sub>2 mechanism is a type of nucleophilic substitution reaction where a nucleophile attacks an electrophile, resulting in the simultaneous displacement of a leaving group. This reaction occurs in a single concerted step, leading to the inversion of configuration at the carbon center. It is characterized by a second-order kinetics, meaning the rate depends on the concentration of both the nucleophile and the substrate.
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05:29
Creating Ribonucleosides

Fischer Projection

A Fischer projection is a two-dimensional representation of a three-dimensional organic molecule, particularly useful for depicting stereochemistry. In this format, vertical lines represent bonds that project away from the viewer, while horizontal lines represent bonds that come towards the viewer. Fischer projections are commonly used to illustrate carbohydrates and amino acids, allowing for easy identification of stereoisomers.
추천 영상:
09:56
Monosaccharides - Drawing Fischer Projections

Nucleophiles and Electrophiles

Nucleophiles are species that donate an electron pair to form a chemical bond, while electrophiles are electron-deficient species that accept an electron pair. In S<sub>N</sub>2 reactions, the nucleophile attacks the electrophile, leading to the substitution of the leaving group. Understanding the nature of these species is crucial for predicting the outcome of organic reactions and determining reaction mechanisms.
추천 영상:
03:
Nucleophile or Electrophile
관련 실천
교과서 질문

For each pair of compounds, state which compound is the better SN2 substrate.

a. 2-methyl-1-iodopropane or tert-butyl iodide.

b. cyclohexyl bromide or 1-bromo-1-methylcyclohexane

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교과서 질문

Propose an SN1 mechanism for the solvolysis of 3-bromo-2,3-dimethylpentane in ethanol.

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교과서 질문

For each pair of compounds, state which compound is the better SN2 substrate.

c. 2-bromobutane or isopropyl bromide

d. 1-chloro-2,2-dimethylbutane or 2-chlorobutane

e. 1-iodobutane or 2-iodopropane

1102
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교과서 질문

Draw a perspective structure or a Fischer projection for the products of the following SN2 reactions.

(a) trans-1-bromo-3-methylcyclopentane + KOH

(b) (R)-2-bromopentane + KCN

1045
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교과서 질문

Draw a perspective structure or a Fischer projection for the products of the following SN2 reactions.

(e)

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교과서 질문

Draw a perspective structure or a Fischer projection for the products of the following SN2 reactions.

(f)

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