Which would be the major isolated organic product of the reaction shown? 1. BH3/THF 2. OH, H₂O₂, H₂O НО. H H. H A) B) D) H H H H OH J F F F H E) a different product or a mixture of more than one of the choices in equal amounts

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Chapter1: Chemical Foundations
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**Question:**
Which would be the major isolated organic product of the reaction shown?

**Reaction:**
Starting material: an alkyne with a benzene ring.

Reagents:
1. \( \text{BH}_3/\text{THF} \)
2. \( \text{OH}^-, \text{H}_2\text{O}_2, \text{H}_2\text{O} \)

**Options:**
- **A)** A benzene ring attached to a chain with a hydroxyl group and two more hydrogen atoms.
- **B)** A benzene ring attached to a chain with a hydroxyl group connected to two hydrogen atoms.
- **C)** A benzene ring attached to a carbonyl group and two hydrogen atoms.
- **D)** A benzene ring attached to a carbonyl group with three hydrogen atoms (ketone).
- **E)** A different product or a mixture of more than one of the choices in equal amounts.

This setup appears to be evaluating a hydroboration-oxidation reaction involving the conversion of the alkyne into an alcohol. The major product would typically involve syn-addition of the hydroxyl group, giving hint to which structure among A, B, C, or D represents the correct alcohol formation after hydroboration-oxidation.
Transcribed Image Text:**Question:** Which would be the major isolated organic product of the reaction shown? **Reaction:** Starting material: an alkyne with a benzene ring. Reagents: 1. \( \text{BH}_3/\text{THF} \) 2. \( \text{OH}^-, \text{H}_2\text{O}_2, \text{H}_2\text{O} \) **Options:** - **A)** A benzene ring attached to a chain with a hydroxyl group and two more hydrogen atoms. - **B)** A benzene ring attached to a chain with a hydroxyl group connected to two hydrogen atoms. - **C)** A benzene ring attached to a carbonyl group and two hydrogen atoms. - **D)** A benzene ring attached to a carbonyl group with three hydrogen atoms (ketone). - **E)** A different product or a mixture of more than one of the choices in equal amounts. This setup appears to be evaluating a hydroboration-oxidation reaction involving the conversion of the alkyne into an alcohol. The major product would typically involve syn-addition of the hydroxyl group, giving hint to which structure among A, B, C, or D represents the correct alcohol formation after hydroboration-oxidation.
**Which would be the major isolated organic product of the reaction shown?**

**Reaction Conditions:**

1. \( \text{BH}_3/\text{THF} \) 
2. \( \text{OH}^-, \text{H}_2\text{O}_2, \text{H}_2\text{O} \)

**Chemical Reaction Diagram:**

- The starting material is a terminal alkyne. 
- The reaction involves hydroboration-oxidation, which typically converts a terminal alkyne into an aldehyde.

**Answer Choices:**

A) A four-carbon chain with a carbonyl group (a terminal aldehyde). 

B) A four-carbon chain with an alcohol group on the second carbon. 

C) A four-carbon chain with a carbonyl group on the second carbon.

D) A five-carbon chain with a carbonyl group on the second carbon.

E) A different product or a mixture of more than one of the choices in equal amounts.

The problem is asking which of these options is the major product of the given reaction on the starting alkyne.
Transcribed Image Text:**Which would be the major isolated organic product of the reaction shown?** **Reaction Conditions:** 1. \( \text{BH}_3/\text{THF} \) 2. \( \text{OH}^-, \text{H}_2\text{O}_2, \text{H}_2\text{O} \) **Chemical Reaction Diagram:** - The starting material is a terminal alkyne. - The reaction involves hydroboration-oxidation, which typically converts a terminal alkyne into an aldehyde. **Answer Choices:** A) A four-carbon chain with a carbonyl group (a terminal aldehyde). B) A four-carbon chain with an alcohol group on the second carbon. C) A four-carbon chain with a carbonyl group on the second carbon. D) A five-carbon chain with a carbonyl group on the second carbon. E) A different product or a mixture of more than one of the choices in equal amounts. The problem is asking which of these options is the major product of the given reaction on the starting alkyne.
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