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Ch. 19 - Nucleophilic Acyl Substitution 2: Carboxylic Acid Derivatives
Mullins - Organic Chemistry: A Learner Centered Approach 1st Edition
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모든 교과서Mullins 1st EditionCh. 19 - Nucleophilic Acyl Substitution 2: Carboxylic Acid Derivatives문제 59a
18장, 문제 59a

Predict the product of the following reaction sequences.
(a) Reaction sequence showing a brominated compound with reagents NaCN, LiAlH4, and H3O+ for product prediction.

검증된 단계별 안내
1
Identify the starting material as a brominated alkane with a phenyl group attached, specifically (R)-1-phenylethyl bromide.
In the first step, sodium cyanide (NaCN) in tetrahydrofuran (THF) is used. This is a nucleophilic substitution reaction where the cyanide ion (CN-) will replace the bromine atom, forming a nitrile group. The product will be (R)-1-phenylethyl cyanide.
In the second step, lithium aluminum hydride (LiAlH4) in THF is used. LiAlH4 is a strong reducing agent that will reduce the nitrile group to a primary amine. The product will be (R)-1-phenylethylamine.
In the third step, the reaction mixture is quenched with H3O+. This step is typically used to neutralize any remaining reactive species and to protonate the amine, if necessary, to ensure the final product is in its neutral form.
The final product of the reaction sequence is (R)-1-phenylethylamine, which retains the stereochemistry of the starting material due to the nature of the reactions involved.

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이 영상 해법은 위 문제에 도움이 된다고 튜터들이 추천한 것입니다.
영상 길이:
2m

주요 개념

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

Reaction Mechanisms

Understanding reaction mechanisms is crucial in organic chemistry as they describe the step-by-step process by which reactants transform into products. This includes identifying intermediates, transition states, and the movement of electrons. A clear grasp of mechanisms helps predict the outcome of reactions and the stability of products formed.
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Functional Groups

Functional groups are specific groups of atoms within molecules that are responsible for the characteristic chemical reactions of those molecules. Recognizing functional groups allows chemists to predict reactivity and the types of reactions that can occur. For example, alcohols, carboxylic acids, and amines each have distinct behaviors in chemical reactions.
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Identifying Functional Groups

Stereochemistry

Stereochemistry involves the study of the spatial arrangement of atoms in molecules and how this affects their chemical behavior. It is essential for predicting the products of reactions, especially in cases where chirality or geometric isomerism plays a role. Understanding stereochemistry helps in determining the specific isomers that may be produced in a reaction.
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