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Which resonance contributor in each pair makes the greater contribution to the resonance hybrid?
c.
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Ch. 8 - Delocalized Electrons: Their Effect on Stability, pKa, and the Products of a Reaction • Aromaticity and Electronic Effects: An Introduction to the Reactions of Benzene
Bruice8th EditionOrganic ChemistryISBN: 9780135213711
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TOC.tableOfContents
- Ch. 1 - Remembering General Chemistry: Electronic Structure and Bonding31
- Ch. 2 - Acids and Bases: Central to Understanding Organic Chemistry84
- Ch. 3 - An Introduction to Organic Compounds: Nomenclature, Physical Properties, and Structure183
- Ch. 4 - Isomers: The Arrangement of Atoms in Space121
- Ch. 5 - Alkenes: Structure, Nomenclature, and an Introduction to Reactivity • Thermodynamics and Kinetics83
- Ch. 6 - The Reactions of Alkenes • The Stereochemistry of Addition Reactions175
- Ch. 7 - The Reactions of Alkynes • An Introduction to Multistep Synthesis119
- Ch. 8 - Delocalized Electrons: Their Effect on Stability, pKa, and the Products of a Reaction • Aromaticity and Electronic Effects: An Introduction to the Reactions of Benzene148
- Ch. 9 - Substitution and Elimination Reactions of Alkyl Halides212
- Ch. 10 - Reactions of Alcohols, Ethers, Epoxides, Amines, and Sulfur-Containing Compounds131
- Ch. 11 - Organometallic Compounds60
- Ch. 12 - Radicals90
- Ch. 13 - Mass Spectrometry; Infrared Spectroscopy; UV/Vis Spectroscopy62
- Ch. 14 - NMR Spectroscopy95
- Ch. 15 - Reactions of Carboxylic Acids and Carboxylic Acid Derivatives123
- Ch. 16 - Reactions of Aldehydes and Ketones • More Reactions of Carboxylic Acid Derivatives141
- Ch. 17 - Reactions at the Alpha-Carbon101
- Ch. 18 - Reactions of Benzene and Substituted Benzenes144
- Ch. 19 - More About Amines • Reactions of Heterocyclic Compounds49
- Ch. 20 - The Organic Chemistry of Carbohydrates80
- Ch. 21 - Amino Acids, Peptides, and Proteins57
- Ch. 22 - Catalysis in Organic Reactions and in Enzymatic Reactions35
- Ch. 23 - The Organic Chemistry of the Coenzymes—Compounds Derived from Vitamins1
- Ch. 28 - Pericyclic Reactions58
Tutti i libri di testo
Bruice 8th EditionCh. 8 - Delocalized Electrons: Their Effect on Stability, pKa, and the Products of a Reaction • Aromaticity and Electronic Effects: An Introduction to the Reactions of BenzeneProblema 73a
Bruice 8th EditionCh. 8 - Delocalized Electrons: Their Effect on Stability, pKa, and the Products of a Reaction • Aromaticity and Electronic Effects: An Introduction to the Reactions of BenzeneProblema 73aCapitolo 8, Problema 73a
Which oxygen atom has the greater electron density?
Guida verificata passo dopo passo1
Identify the functional group in the molecule. The structure contains an ester functional group, which consists of a carbonyl group (C=O) and an alkoxy group (-OCH3).
Examine the two oxygen atoms in the ester group. One oxygen is part of the carbonyl group (C=O), and the other is part of the alkoxy group (-OCH3).
Consider the electron density distribution. The oxygen in the carbonyl group is directly bonded to the carbon atom, which is sp2 hybridized and has a partial positive charge due to the electronegativity difference. This oxygen is involved in resonance with the carbonyl group, which delocalizes its electron density.
Analyze the alkoxy oxygen (-OCH3). This oxygen is bonded to a carbon atom and does not participate in resonance with the carbonyl group. It retains its lone pairs and is less influenced by electron withdrawal compared to the carbonyl oxygen.
Conclude that the alkoxy oxygen (-OCH3) has greater electron density because it is not involved in resonance and is less affected by the electron-withdrawing effects of the carbonyl group.
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Electronegativity
Electronegativity is the tendency of an atom to attract electrons towards itself in a chemical bond. In organic chemistry, oxygen is more electronegative than carbon and hydrogen, which means it pulls electron density towards itself. This property is crucial for understanding the distribution of electron density in molecules, particularly in functional groups containing oxygen.
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1:47
Electronegativity
Resonance Structures
Resonance structures are different ways of drawing the same molecule that illustrate the delocalization of electrons. In the context of the given structure, resonance can affect the electron density around the oxygen atoms. The more resonance structures that can be drawn, the more stable the molecule is, and this can influence the electron density on specific atoms, including oxygen.
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03:04Drawing Resonance Structures
Inductive Effect
The inductive effect refers to the transmission of charge through a chain of atoms in a molecule due to the electronegativity differences. In the provided structure, the presence of electron-withdrawing groups (like the carbonyl group) can increase the electron density on adjacent atoms, including the oxygen atoms. Understanding this effect is essential for determining which oxygen atom has greater electron density.
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01:47Understanding the Inductive Effect.
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