Textbook Question
The following molecules were named incorrectly according to IUPAC nomenclature. Give the correct name of these compounds.
b. (R)-6-bromo-7-oxoheptan-2-one
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Ch. 17 - Carbonyl Addition Reactions: Aldehydes and Ketones
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. 17 - Carbonyl Addition Reactions: Aldehydes and KetonesProblem 60
Mullins 1st EditionCh. 17 - Carbonyl Addition Reactions: Aldehydes and KetonesProblem 60Chapter 16, Problem 60
Draw the molecular orbital picture of but-3-en-2-one.
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Identify the structure of but-3-en-2-one: This molecule contains a conjugated system with a carbonyl group (C=O) and a C=C double bond. The conjugation arises because the π electrons in the C=C bond and the π electrons in the C=O bond can delocalize over the molecule.
Determine the number of π electrons in the conjugated system: The C=C double bond contributes 2 π electrons, and the C=O double bond also contributes 2 π electrons. Thus, the conjugated system has a total of 4 π electrons.
Construct the molecular orbital (MO) diagram: In a conjugated system with 4 π electrons, there are 2 bonding molecular orbitals (π1 and π2) and 2 antibonding molecular orbitals (π*1 and π*2). The energy levels of these orbitals increase as follows: π1 < π2 < π*1 < π*2.
Populate the molecular orbitals with electrons: The 4 π electrons will fill the molecular orbitals starting from the lowest energy level. Thus, π1 (the lowest energy bonding orbital) will hold 2 electrons, and π2 (the next bonding orbital) will hold the remaining 2 electrons. The antibonding orbitals (π*1 and π*2) will remain unoccupied.
Draw the molecular orbital diagram: Represent the energy levels of the molecular orbitals on the y-axis, with the bonding orbitals (π1 and π2) at lower energy and the antibonding orbitals (π*1 and π*2) at higher energy. Indicate the placement of the 4 π electrons in the bonding orbitals. Additionally, show the delocalization of the π electrons over the conjugated system in the structural representation of but-3-en-2-one.
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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 predicting the electronic structure and properties of molecules, including their geometry and energy levels.
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But-3-en-2-one Structure
But-3-en-2-one, also known as mesityl oxide, is a four-carbon compound with a double bond and a ketone functional group. Its structure includes a carbon-carbon double bond between the second and third carbons and a carbonyl group (C=O) at the second carbon. Recognizing the arrangement of these functional groups is essential for accurately drawing its molecular orbital diagram.
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Hybridization
Hybridization is the concept of mixing atomic orbitals to form new hybrid orbitals that can accommodate bonding in molecules. In but-3-en-2-one, the carbon atoms involved in the double bond and the carbonyl group exhibit sp2 hybridization, which allows for the formation of a planar structure and effective overlap of orbitals. Understanding hybridization helps in visualizing the geometry and bonding characteristics of the molecule.
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Related Practice
Textbook Question
The following molecules were named incorrectly according to IUPAC nomenclature. Give the correct name of these compounds.
d. (E)-2-methylhex-2-en-6-al
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Textbook Question
Suggest a synthetic scheme, involving a protecting group, to generate the molecule shown starting with the molecule at the left.
(a)
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Textbook Question
The following molecules were named incorrectly according to IUPAC nomenclature. Give the correct name of these compounds.
(a) 3-oxo-5-methylhexan-2-ol
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Textbook Question
In lieu of quenching the product of Grignard addition to a carbonyl with acid, alkyl halides can be added directly to generate ether products. Predict the product and show the mechanism of this process.
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Textbook Question
Starting with formaldehyde and the alkyl halides shown as the only sources of carbon, provide a synthesis of the following alcohol.
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