Domanda del libro di testo
For the alkynes shows here, show the product(s) expected to form when treated under the following conditions: (v) HCl (2 equiv.). If you expect two products, show both.
(c)
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Ch. 10 - Alkynes: Electrophilic Addition and Redox Reactions
Mullins1st EditionOrganic Chemistry: A Learner Centered ApproachISBN: 9780137566471
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TOC.tableOfContents
- Ch. 2 - General Chemistry Translated: Finding the Electrons114
- Ch. 3 - Alkanes and Cycloalkanes: Properties and Conformational Analysis109
- Ch. 4 - Acids and Bases/Electron Flow144
- Ch. 5 - Chemical Reaction Analysis: Thermodynamics and Kinetics118
- Ch. 6 - Stereoisomerism: Arrangement of Atoms in Space112
- Ch. 7 - Principles of Green (Organic) Chemistry3
- Ch. 8 - Alkenes 1: Properties and Electrophilic Additions158
- Ch. 9 - Alkenes 2: Oxidation and Reduction150
- Ch. 10 - Alkynes: Electrophilic Addition and Redox Reactions101
- Ch. 11 - Properties and Synthesis of Alkyl Halides: Radical Reactions108
- Ch. 12 - Substitution and Elimination: Reactions of Haloalkanes172
- Ch. 13 - Alcohols, Ethers and Related Compounds: Substitution and Elimination239
- Ch. 14 - Structural Identification 1: Infrared Spectroscopy and Mass Spectrometry54
- Ch. 15 - Structural Identification 2: Nuclear Magnetic Resonance Spectroscopy93
- Ch. 16 - Metals in Organic Chemistry48
- Ch. 17 - Carbonyl Addition Reactions: Aldehydes and Ketones45
- Ch. 18 - Nucleophilic Acyl Substitution 1: Carboxylic Acids18
- Ch. 19 - Nucleophilic Acyl Substitution 2: Carboxylic Acid Derivatives39
- Ch. 20 - Enolates: Carbonyl Addition and Substitution13
- Ch. 21 - Conjugated Systems 1: Stability and Addition Reactions56
- Ch. 22 - Conjugated Systems 2: Pericyclic Reactions54
- Ch. 23 - Benzene 1: Aromatic Stability and Substitution Reactions64
- Ch. 24 - Benzene 2: Reactions Influenced by the Aromatic Ring62
- Ch. 25 - Amines: Structure, Reactions, and Synthesis27
- Ch. 26 - Amino Acids, Proteins, and Peptide Synthesis9
- Ch. 27 - Carbohydrates, Nucleic Acids, and Lipids54
Mullins1st EditionOrganic Chemistry: A Learner Centered ApproachISBN: 9780137566471Non è quello che usi tu?Cambia libro di testo
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Mullins 1st EditionCh. 10 - Alkynes: Electrophilic Addition and Redox ReactionsProblema 44c(iii)
Mullins 1st EditionCh. 10 - Alkynes: Electrophilic Addition and Redox ReactionsProblema 44c(iii)Capitolo 9, Problema 44c(iii)
For the alkynes shows here, show the product(s) expected to form when treated under the following conditions: (iii) Na0 , NH3 (liquid), ―33°C . If you expect two products, show both.
(c) 
Guida verificata passo dopo passo1
Identify the reaction type: The given reagents (Na⁰, NH₃ (liquid), ―33°C) indicate a dissolving metal reduction. This reaction is used to reduce alkynes to trans-alkenes.
Understand the mechanism: In a dissolving metal reduction, sodium donates an electron to the alkyne, forming a radical anion. This is followed by protonation from ammonia, and the process repeats to form a trans-alkene.
Determine the starting alkyne structure: Analyze the structure of the alkyne provided in part (c) to identify the triple bond and any substituents attached to it.
Predict the product(s): The triple bond in the alkyne will be reduced to a double bond, specifically forming a trans-alkene. If the alkyne is symmetrical, only one product will form. If it is asymmetrical, two possible trans-alkenes may form due to different substituent arrangements.
Draw the product(s): Represent the trans-alkene(s) with the substituents on opposite sides of the double bond. Ensure the stereochemistry is clear and consistent with the reaction mechanism.
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Alkynes
Alkynes are hydrocarbons that contain at least one carbon-carbon triple bond (C≡C). They are unsaturated compounds and can undergo various reactions, including addition and reduction. Understanding the structure and reactivity of alkynes is crucial for predicting the products formed during chemical reactions.
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Alkyne Hydration
Reduction Reactions
Reduction reactions involve the gain of electrons or the decrease in oxidation state by a molecule. In the context of alkynes, treatment with sodium (Na⁰) in liquid ammonia (NH₃) at low temperatures typically leads to the reduction of the triple bond to a double bond, forming alkenes. This process is essential for understanding how alkynes can be transformed into other organic compounds.
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Stereochemistry of Alkenes
Stereochemistry refers to the spatial arrangement of atoms in molecules and how this affects their chemical behavior. When alkynes are reduced to alkenes, the resulting double bond can exhibit cis/trans (E/Z) isomerism, depending on the substituents attached to the double bond. Recognizing the potential for different stereoisomers is important for predicting the products of the reaction.
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Percorso guidato
1:38Polymer Stereochemistry Concept 1
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For the alkynes shows here, show the product(s) expected to form when treated under the following conditions: (ix) Br2 (2 equiv.). If you expect two products, show both.
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For the alkynes shows here, show the product(s) expected to form when treated under the following conditions: (iv) HBr (1 equiv.). If you expect two products, show both.
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For the alkynes shows here, show the product(s) expected to form when treated under the following conditions: (ix) Br2 (2 equiv.). If you expect two products, show both.
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