Provide an arrow-pushing mechanism for the following acid–base reactions.
(d)

검증된 단계별 안내

Step 1: Identify the acid and base in the reaction. The molecule with the hydroxyl group (-OH) attached to the carbonyl group is the acid, as it can donate a proton. The molecule with the amine group (-NH2) is the base, as it can accept a proton.

Step 2: Draw the initial interaction. The lone pair of electrons on the nitrogen atom of the amine group will attack the hydrogen atom of the hydroxyl group on the acid. This is the proton transfer step.

Step 3: Represent the movement of electrons using curved arrows. The curved arrow starts from the lone pair on the nitrogen and points toward the hydrogen atom of the hydroxyl group. Simultaneously, another curved arrow shows the breaking of the O-H bond, with the electrons moving to the oxygen atom.

Step 4: Show the resulting products. After the proton transfer, the amine group becomes protonated, forming an ammonium ion (-NH3+). The acid loses a proton, forming its conjugate base, which is the deprotonated carboxylate ion (-COO−).

Step 5: Verify the equilibrium. The reaction is reversible, as indicated by the double arrow. Ensure that the products (ammonium ion and carboxylate ion) are correctly drawn and match the structures provided in the image.

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이 영상 해법은 위 문제에 도움이 된다고 튜터들이 추천한 것입니다.

영상 길이:

주요 개념

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

Acid-Base Reactions

Acid-base reactions involve the transfer of protons (H+) between reactants. In organic chemistry, acids are proton donors, while bases are proton acceptors. Understanding the strength of acids and bases, as well as their conjugate pairs, is crucial for predicting the direction of the reaction and the stability of the resulting species.

Arrow-Pushing Mechanism

The arrow-pushing mechanism is a method used to illustrate the movement of electrons during chemical reactions. Arrows indicate the flow of electron pairs, showing how bonds are formed and broken. This visual representation helps in understanding the stepwise progression of reactions, particularly in acid-base chemistry where proton transfers are involved.

Resonance Structures

Resonance structures are different ways of drawing the same molecule that illustrate the delocalization of electrons. In acid-base reactions, resonance can stabilize charged intermediates, influencing the reaction pathway and the stability of products. Recognizing resonance can help predict the most favorable reaction mechanisms and the stability of the resulting species.

Provide an arrow-pushing mechanism for the following acid–base reactions. (d)