Domanda del libro di testo
For the alkynes shows here, show the product(s) expected to form when treated under the following conditions: (ii) H2, Pd/C, Pb(OAc)2 , CaCO3 (Lindlar's catalyst). 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(ix)
Mullins 1st EditionCh. 10 - Alkynes: Electrophilic Addition and Redox ReactionsProblema 44c(ix)Capitolo 9, Problema 44c(ix)
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.
(c) 
Guida verificata passo dopo passo1
Identify the alkyne structure in the given problem. Alkynes are hydrocarbons containing a carbon-carbon triple bond (C≡C). Note that the reaction involves Br₂ (bromine) in 2 equivalents, which means the reaction will proceed in two steps.
Understand the reaction mechanism: When an alkyne reacts with Br₂, the first equivalent of bromine adds across the triple bond, converting it into a dibromoalkene (a double bond with two bromine atoms attached). The second equivalent of bromine then reacts with the dibromoalkene to form a tetrabromoalkane (a single bond with four bromine atoms attached).
Write the reaction for the first equivalent of Br₂: The triple bond (C≡C) undergoes an electrophilic addition reaction with Br₂, forming a trans-dibromoalkene. Represent this intermediate product using the correct chemical structure.
Write the reaction for the second equivalent of Br₂: The trans-dibromoalkene reacts with another molecule of Br₂, resulting in the addition of two more bromine atoms across the double bond. This forms a tetrabromoalkane as the final product. Represent this final product using the correct chemical structure.
If stereochemistry is relevant, ensure that you indicate the stereochemical outcomes (e.g., anti-addition for the first step). If two products are possible due to symmetry or regioselectivity, clearly show both products and explain why they form.
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Alkynes
Alkynes are hydrocarbons that contain at least one carbon-carbon triple bond (C≡C). They are unsaturated compounds and are generally more reactive than alkenes and alkanes due to the presence of this triple bond. Understanding the structure and reactivity of alkynes is crucial for predicting the products of chemical reactions involving these compounds.
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09:11
Alkyne Hydration
Electrophilic Addition Reactions
Electrophilic addition reactions occur when an electrophile reacts with a nucleophile, leading to the formation of a more saturated product. In the case of alkynes, the triple bond acts as a nucleophile, allowing electrophiles like bromine (Br₂) to add across the triple bond. This reaction typically results in the formation of dibrominated products when two equivalents of bromine are used.
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05:39Features of Addition Mechanisms.
Regioselectivity and Stereochemistry
Regioselectivity refers to the preference of a chemical reaction to yield one structural isomer over others, while stereochemistry involves the spatial arrangement of atoms in molecules. When alkynes react with bromine, the addition can lead to different products based on how the bromine atoms add to the carbon atoms of the triple bond, resulting in both regioisomers and potential stereoisomers, depending on the reaction conditions.
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Percorso guidato
1:38Polymer Stereochemistry Concept 1
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