Functional Group Transformations? Starting Compound Typical Reagents Compound and Reaction Class Class Conditions Formed HX HX (2 equiv) (5) -C C- -C-C- Alkyne HX Geminal dihalide H. H20 (6) -C=C- H-C-C TFOH, Alkyne CF3CH,OH Ketone
Functional Group Transformations? Starting Compound Typical Reagents Compound and Reaction Class Class Conditions Formed HX HX (2 equiv) (5) -C C- -C-C- Alkyne HX Geminal dihalide H. H20 (6) -C=C- H-C-C TFOH, Alkyne CF3CH,OH Ketone
Organic Chemistry: A Guided Inquiry
2nd Edition
ISBN:9780618974122
Author:Andrei Straumanis
Publisher:Andrei Straumanis
Chapter18: Aromaticity
Section: Chapter Questions
Problem 18CTQ
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What is the mechanism to get from the reactant to the products
![**Functional Group Transformations:**
| Starting Compound Class | Typical Reagents and Reaction Conditions | Compound Class Formed |
|-------------------------|------------------------------------------|-------------------------|
| **5)** Alkyne | HX (2 equiv) | Geminal dihalide |
| ![Alkyne structure: C≡C] | | ![Geminal dihalide structure: H-C-C-H with halogen atoms X attached to each carbon] |
| **6)** Alkyne | H₂O, TfOH, CF₃CH₂OH | Ketone |
| ![Alkyne structure: C≡C] | | ![Ketone structure: H-C(=O)-C-R] |
**Diagram Descriptions:**
1. **Reaction 5**: An alkyne undergoes a transformation using two equivalents of hydrogen halide (HX). The result is a geminal dihalide, where the halogen atoms (X) are added to the same carbon atom adjacent to the hydrogen atom across the triple bond.
2. **Reaction 6**: An alkyne is treated with water (H₂O) in the presence of trifluoromethanesulfonic acid (TfOH) and ethyl trifluoroacetate (CF₃CH₂OH). The transformation yields a ketone, characterized by a carbonyl group (C=O) bonded to two carbon atoms.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fbcb84e85-6ef5-4443-bb25-24691274122e%2F7f80d186-88ac-4604-8f12-9b4fcfb49eb8%2Focq8j4e_processed.jpeg&w=3840&q=75)
Transcribed Image Text:**Functional Group Transformations:**
| Starting Compound Class | Typical Reagents and Reaction Conditions | Compound Class Formed |
|-------------------------|------------------------------------------|-------------------------|
| **5)** Alkyne | HX (2 equiv) | Geminal dihalide |
| ![Alkyne structure: C≡C] | | ![Geminal dihalide structure: H-C-C-H with halogen atoms X attached to each carbon] |
| **6)** Alkyne | H₂O, TfOH, CF₃CH₂OH | Ketone |
| ![Alkyne structure: C≡C] | | ![Ketone structure: H-C(=O)-C-R] |
**Diagram Descriptions:**
1. **Reaction 5**: An alkyne undergoes a transformation using two equivalents of hydrogen halide (HX). The result is a geminal dihalide, where the halogen atoms (X) are added to the same carbon atom adjacent to the hydrogen atom across the triple bond.
2. **Reaction 6**: An alkyne is treated with water (H₂O) in the presence of trifluoromethanesulfonic acid (TfOH) and ethyl trifluoroacetate (CF₃CH₂OH). The transformation yields a ketone, characterized by a carbonyl group (C=O) bonded to two carbon atoms.
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