Textbook Question
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)
3
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Ch. 10 - Alkynes: Electrophilic Addition and Redox Reactions
Mullins1st EditionOrganic Chemistry: A Learner Centered ApproachISBN: 9780137566471
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Table of contents
- 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 I: Properties and Electrophilic Additions158
- Ch. 9 - Alkenes II: 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 I: Infrared Spectroscopy and Mass Spectrometry54
- Ch. 15 - Structural Identification II: Nuclear Magnetic Resonance Spectroscopy93
- Ch. 16 - Metals in Organic Chemistry48
- Ch. 17 - Carbonyl Addition Reactions: Aldehydes and Ketones45
- Ch. 18 - Nucleophilic Acyl Substitution I: Carboxylic Acids18
- Ch. 19 - Nucleophilic Acyl Substitution II: Carboxylic Acid Derivatives39
- Ch. 20 - Enolates: Carbonyl Addition and Substitution13
- Ch. 21 - Conjugated Systems I: Stability and Addition Reactions56
- Ch. 22 - Conjugated Systems II: Pericyclic Reactions54
- Ch. 23 - Benzene I: Aromatic Stability and Substitution Reactions64
- Ch. 24 - Benzene II: 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: 9780137566471Not the one you use?Change textbook
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Mullins 1st EditionCh. 10 - Alkynes: Electrophilic Addition and Redox ReactionsProblem 43a
Mullins 1st EditionCh. 10 - Alkynes: Electrophilic Addition and Redox ReactionsProblem 43aChapter 9, Problem 43a
Draw the molecular orbital picture of pent-1-en-3-yne.
Verified step by step guidance1
Step 1: Identify the structure of pent-1-en-3-yne. This molecule contains a five-carbon chain with a double bond at the first carbon and a triple bond at the third carbon. Write the condensed structural formula as CH₂=CH-C≡C-CH₃.
Step 2: Determine the hybridization of each carbon atom. The first carbon in the double bond is sp² hybridized, the second carbon in the double bond is sp² hybridized, the third carbon in the triple bond is sp hybridized, the fourth carbon in the triple bond is sp hybridized, and the fifth carbon is sp³ hybridized.
Step 3: Draw the molecular orbitals for each bond type. For the double bond, show one σ bond formed by the overlap of sp² orbitals and one π bond formed by the overlap of unhybridized p orbitals. For the triple bond, show one σ bond formed by the overlap of sp orbitals and two π bonds formed by the overlap of unhybridized p orbitals.
Step 4: Include lone pairs and any remaining orbitals. For sp² and sp hybridized carbons, show the unhybridized p orbitals that contribute to π bonding. For sp³ hybridized carbons, show the tetrahedral arrangement of σ bonds.
Step 5: Assemble the complete molecular orbital diagram, ensuring all bonds and orbitals are represented accurately. Highlight the delocalized π system if applicable, and confirm the geometry matches the hybridization of each atom.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Molecular Orbitals
Molecular orbitals (MOs) are formed by the combination of atomic orbitals when atoms bond together. They can be classified as bonding, antibonding, or non-bonding orbitals, which influence the stability and reactivity of the molecule. Understanding MOs is crucial for visualizing electron distribution and predicting molecular properties.
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Hybridization
Hybridization is the process of mixing atomic orbitals to create new hybrid orbitals that can form sigma bonds in a molecule. In pent-1-en-3-yne, the carbon atoms undergo sp2 and sp hybridization, which affects the geometry and bonding characteristics of the molecule. Recognizing the type of hybridization helps in drawing accurate molecular structures.
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Alkynes and Alkenes
Alkynes and alkenes are types of unsaturated hydrocarbons characterized by the presence of triple and double bonds, respectively. Pent-1-en-3-yne contains both a double bond (alkene) and a triple bond (alkyne), which significantly influence its reactivity and physical properties. Understanding these functional groups is essential for constructing the correct molecular orbital diagram.
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Related Practice
Textbook Question
Name the following alkynes according to the IUPAC rules of nomenclature.
(d)
1
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Textbook Question
Name the following alkynes according to the IUPAC rules of nomenclature.
(c)
1
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Textbook Question
For the alkynes shows here, show the product(s) expected to form when treated under the following conditions: (vii) 1. BH3 2. H2O2, NaOH. If you expect two products, show both.
(c)
6
views
Textbook Question
To which carbon would you expect an electrophile to add (1, 3, or 4)? Explain your answer.
1
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Textbook Question
Name the following alkynes according to the IUPAC rules of nomenclature.
(b)
1
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