Textbook Question
You might expect that aldehydes and ketones could undergo the addition/elimination mechanism. With strong nucleophiles, however, nucleophilic addition is the only outcome. Why?
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Ch. 19 - Nucleophilic Acyl Substitution II: Carboxylic Acid Derivatives
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. 19 - Nucleophilic Acyl Substitution II: Carboxylic Acid DerivativesProblem 11b
Mullins 1st EditionCh. 19 - Nucleophilic Acyl Substitution II: Carboxylic Acid DerivativesProblem 11bChapter 18, Problem 11b
Predict the hybridization of the indicated atoms.
(b) 
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Identify the atom in question and examine its bonding environment. Count the number of sigma bonds (single bonds) and lone pairs of electrons around the atom.
Use the formula for hybridization: Hybridization = (Number of sigma bonds + Number of lone pairs). This will help determine the steric number of the atom.
Match the steric number to the corresponding hybridization: steric number 2 = sp, steric number 3 = sp², steric number 4 = sp³, steric number 5 = sp³d, steric number 6 = sp³d².
Consider the geometry of the molecule to confirm the hybridization. For example, sp corresponds to linear geometry, sp² to trigonal planar, and sp³ to tetrahedral.
Verify your prediction by checking the molecular structure and ensuring that the hybridization aligns with the observed bond angles and geometry.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Hybridization
Hybridization is the concept in chemistry where atomic orbitals mix to form new hybrid orbitals, which can explain the geometry of molecular bonding. For example, in carbon, the mixing of one s and three p orbitals results in four sp3 hybrid orbitals, leading to a tetrahedral shape. Understanding hybridization helps predict molecular shapes and bond angles.
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VSEPR Theory
Valence Shell Electron Pair Repulsion (VSEPR) Theory is used to predict the geometry of molecules based on the repulsion between electron pairs around a central atom. According to VSEPR, electron pairs will arrange themselves to minimize repulsion, leading to specific molecular shapes such as linear, trigonal planar, or tetrahedral. This theory is essential for visualizing molecular structures.
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Bonding and Lone Pairs
In molecular structures, bonding pairs of electrons are shared between atoms, while lone pairs are non-bonding electrons localized on a single atom. The presence of lone pairs can significantly affect the hybridization and geometry of a molecule, as they occupy space and influence the arrangement of bonding pairs. Recognizing the role of lone pairs is crucial for accurate predictions of molecular shape.
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Related Practice
Textbook Question
Provide a molecular structure that corresponds to the given name.
(e) (R)-N,N-diethyl 5-cyclohexyl-3-methoxypentanamide
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Textbook Question
Provide a molecular structure that corresponds to the given name.
(a) benzoic propanoic anhydride
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Textbook Question
How would you expect the IR and ¹H NMR spectra for propanamide and N,N-diethylpropanamide to differ?
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Textbook Question
A chemist unsuccessfully attempted to produce the 1,4-cyclohexanediol by hydration of the cyclohexene shown.
(a) Provide a mechanism for the formation of the actual product.
(b) Suggest a pathway using acetyl chloride as a protecting group that will allow for the formation of the desired product.
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Textbook Question
Provide the IUPAC name for the following molecules.
(e)
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