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Ch.10 - Structure and Synthesis of Alcohols
Wade - Organic Chemistry 9th Edition
Wade9th EditionOrganic ChemistryISBN: 9780135213728당신이 사용하는 게 아니라요?교과서 변경
모든 교과서Wade 9th EditionCh.10 - Structure and Synthesis of Alcohols문제 27
10장, 문제 27

Arrange the following compounds in order of decreasing acidity.
CH3COOH, CH3OH, CH3CH3, CH3SO3H, CH3NH2, CH3SH, CH3C≡CH

검증된 단계별 안내
1
Step 1: Understand the concept of acidity. Acidity is determined by the ability of a compound to donate a proton (H⁺). The more stable the conjugate base formed after losing a proton, the stronger the acid.
Step 2: Analyze the functional groups in each compound. CH3COOH (acetic acid) contains a carboxylic acid group, CH3OH (methanol) contains an alcohol group, CH3CH3 (ethane) is an alkane, CH3SO3H (methanesulfonic acid) contains a sulfonic acid group, CH3NH2 (methylamine) contains an amine group, CH3SH (methanethiol) contains a thiol group, and CH3C≡CH (propyne) contains an alkyne group.
Step 3: Compare the electron-withdrawing effects of the functional groups. Electron-withdrawing groups stabilize the conjugate base, increasing acidity. Sulfonic acid (CH3SO3H) is highly acidic due to strong electron-withdrawing effects. Carboxylic acid (CH3COOH) is next, followed by thiol (CH3SH), alcohol (CH3OH), alkyne (CH3C≡CH), amine (CH3NH2), and alkane (CH3CH3).
Step 4: Consider resonance stabilization. CH3COOH and CH3SO3H have resonance stabilization in their conjugate bases, making them more acidic. CH3C≡CH has some acidity due to the sp hybridization of the carbon atom bonded to the hydrogen, which increases electronegativity.
Step 5: Arrange the compounds in order of decreasing acidity based on the analysis: CH3SO3H > CH3COOH > CH3SH > CH3OH > CH3C≡CH > CH3NH2 > CH3CH3.

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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.

Acidity and pKa

Acidity refers to the ability of a compound to donate a proton (H+) in a solution. The strength of an acid is often measured by its pKa value, where lower pKa values indicate stronger acids. Understanding the relationship between structure and acidity is crucial for predicting the order of acidity among different compounds.
추천 영상:
07:45
Identifying pKa values

Functional Groups and Their Effects on Acidity

Different functional groups influence the acidity of a compound. For example, carboxylic acids (like CH3COOH) are generally more acidic than alcohols (like CH3OH) due to the stability of their conjugate bases. Recognizing how electronegative atoms and resonance can stabilize negative charges is essential for comparing acidity.
추천 영상:
02:36
Identifying Functional Groups

Inductive Effect and Resonance

The inductive effect refers to the electron-withdrawing or electron-donating effects of substituents on a molecule, which can influence acidity. Additionally, resonance can stabilize the conjugate base of an acid, enhancing its acidity. Understanding these concepts helps in predicting the relative acidity of compounds based on their molecular structure.
추천 영상:
01:47
Understanding the Inductive Effect.
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