Predict the product(s) that would result when molecules (a)–(p) are allowed to react under the following conditions: (vi) H₂SO₄. If no reaction occurs, write 'no reaction.'
(a)

검증된 단계별 안내

Identify the functional group in the given molecule. The structure shows a benzene ring with a primary alcohol group attached, known as benzyl alcohol.

Consider the reaction conditions: H₂SO₄ is a strong acid and can act as a dehydrating agent.

Recognize that under acidic conditions, primary alcohols can undergo dehydration to form alkenes. In this case, benzyl alcohol can lose a water molecule to form a double bond.

Propose the mechanism: The hydroxyl group (OH) will be protonated by H₂SO₄, making it a better leaving group. This will lead to the formation of a carbocation.

Predict the product: The carbocation formed can lose a proton to form a double bond, resulting in the formation of styrene (phenylethene) as the major product.

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주요 개념

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Acid-Base Reactions

In organic chemistry, acid-base reactions involve the transfer of protons (H⁺) between molecules. Strong acids, like sulfuric acid (H₂SO₄), can donate protons to bases, facilitating various reactions such as dehydration or protonation. Understanding the role of acids and bases is crucial for predicting the outcome of reactions involving functional groups.

Electrophilic Addition

Electrophilic addition is a fundamental reaction mechanism in organic chemistry where an electrophile reacts with a nucleophile, leading to the formation of a more saturated product. In the presence of H₂SO₄, alkenes and alkynes can undergo electrophilic addition, resulting in the formation of carbocations and subsequent products. Recognizing the nature of the reactants helps in predicting the products formed.

Reaction Conditions

The conditions under which a reaction occurs significantly influence the products formed. In this case, the presence of concentrated sulfuric acid can lead to dehydration reactions, where water is removed from alcohols or alkenes, forming alkenes or ethers. Understanding how temperature, concentration, and solvent affect reaction pathways is essential for accurate predictions.

Predict the product(s) that would result when molecules (a)–(p) are allowed to react under the following conditions: (vi) H₂SO₄. If no reaction occurs, write 'no reaction.' (a)