Predict the product(s) that would result when the alkenes shown here are allowed to react under the following conditions: (vi) 1. BH₃ 2. H₂O₂, NaOH
(g)

검증된 단계별 안내

Identify the reaction type: The given reagents (1. BH₃, 2. H₂O₂, NaOH) indicate a hydroboration-oxidation reaction. This reaction is used to convert an alkene into an alcohol.

Understand the regioselectivity: Hydroboration-oxidation follows anti-Markovnikov addition, meaning the hydroxyl group (-OH) will attach to the less substituted carbon of the double bond.

Understand the stereochemistry: The addition of BH₃ occurs in a syn fashion, meaning both the boron and hydrogen add to the same side of the alkene. This stereochemistry is retained during the oxidation step, resulting in a syn addition of the hydroxyl group and hydrogen.

Apply the reaction to the given alkene: Identify the double bond in the alkene structure and determine which carbon is less substituted. Attach the hydroxyl group (-OH) to the less substituted carbon and a hydrogen atom to the more substituted carbon.

Draw the product: After determining the regioselectivity and stereochemistry, draw the final product, ensuring the hydroxyl group is on the less substituted carbon and the stereochemistry reflects syn addition.

비슷한 문제에 대한 검증된 영상 답변:

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.

Hydroboration-Oxidation

Hydroboration-oxidation is a two-step reaction process used to convert alkenes into alcohols. In the first step, borane (BH₃) adds across the double bond of the alkene, resulting in a trialkylborane intermediate. The second step involves oxidation with hydrogen peroxide (H₂O₂) in the presence of a base (NaOH), which converts the boron atom into a hydroxyl group, yielding an alcohol.

Regioselectivity

Regioselectivity refers to the preference of a chemical reaction to yield one structural isomer over others when multiple products are possible. In hydroboration, the addition of borane occurs in a syn manner, favoring the formation of the less substituted alcohol due to the anti-Markovnikov rule, where the hydroxyl group ends up on the less substituted carbon of the alkene.

Stereochemistry

Stereochemistry is the study of the spatial arrangement of atoms in molecules and how this affects their chemical behavior. In the hydroboration-oxidation process, the syn addition of BH₃ leads to specific stereochemical outcomes in the final alcohol product, which can influence the reactivity and properties of the resulting compound.

Predict the product(s) that would result when the alkenes shown here are allowed to react under the following conditions: (vi) 1. BH3 2. H2O2, NaOH(g)