Domanda del libro di testo
Would you expect the following molecules to absorb in the UV–visible region of the electromagnetic spectrum?
(a)
(b)
(c)
(d)
(e)
432
views
Ch. 21 - Conjugated Systems 1: Stability and Addition Reactions
Mullins1st EditionOrganic Chemistry: A Learner Centered ApproachISBN: 9780137566471
Non è quello che usi tu?Cambia libro di testoScegli un libro di testo diverso
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
Tutti i libri di testo
Mullins 1st EditionCh. 21 - Conjugated Systems 1: Stability and Addition ReactionsProblema 53
Mullins 1st EditionCh. 21 - Conjugated Systems 1: Stability and Addition ReactionsProblema 53Capitolo 20, Problema 53
Draw the molecular orbital picture of octa-1,3,5,7-tetraene, indicating which is the HOMO and which is the LUMO.
Guida verificata passo dopo passo1
Identify the structure of octa-1,3,5,7-tetraene, which is a linear conjugated system with eight carbon atoms and alternating double bonds.
Determine the number of π electrons in the molecule. Each double bond contributes two π electrons, so for four double bonds, there are 8 π electrons.
Construct the molecular orbital diagram for a linear conjugated system with eight π electrons. This involves creating a series of π molecular orbitals, each with increasing energy levels.
Fill the molecular orbitals with the 8 π electrons, starting from the lowest energy orbital and following Hund's rule and the Pauli exclusion principle.
Identify the Highest Occupied Molecular Orbital (HOMO) as the highest energy orbital that contains electrons, and the Lowest Unoccupied Molecular Orbital (LUMO) as the next higher energy orbital that does not contain electrons.
Risposta video verificata per un problema simile:
Questa soluzione video è stata consigliata dai nostri tutor come utile per risolvere questo problema.
Concetti chiave
Ecco i concetti essenziali che devi comprendere per rispondere correttamente alla domanda.
Molecular Orbitals
Molecular orbitals (MOs) are formed by the combination of atomic orbitals when atoms bond together. In conjugated systems like octa-1,3,5,7-tetraene, MOs can be classified as bonding, non-bonding, or antibonding. The arrangement and energy levels of these orbitals are crucial for understanding the electronic structure and reactivity of the molecule.
Video consigliato:
08:41
Review of Molecular Orbitals
HOMO and LUMO
The Highest Occupied Molecular Orbital (HOMO) is the molecular orbital that contains the highest energy electrons, while the Lowest Unoccupied Molecular Orbital (LUMO) is the lowest energy orbital that is unoccupied. The energy difference between the HOMO and LUMO is significant for predicting the molecule's reactivity and stability, as it influences how the molecule interacts with light and other chemical species.
Video consigliato:
02:35HOMO vs. LUMO
Conjugation
Conjugation refers to the overlap of p-orbitals across adjacent double bonds, allowing for delocalization of π electrons. In octa-1,3,5,7-tetraene, this delocalization stabilizes the molecule and affects its electronic properties. Understanding conjugation is essential for drawing accurate molecular orbital diagrams and predicting the behavior of the molecule in various chemical contexts.
Video consigliato:
03:27Conjugated states
Pratica correlata
Domanda del libro di testo
The dye alizarin normally forms an orange solution when dissolved. However, if KOEt is added to the solution, it turns blue very rapidly. Rationalize this result.
1095
views
Domanda del libro di testo
Which of the following reactions would you expect to be faster/more favorable in each pair? Why?
(c)
515
views
Domanda del libro di testo
Which of the following reactions would you expect to be faster/more favorable in each pair? Why?
(b)
573
views
Domanda del libro di testo
On a per alkene basis, which would have the more negative heat of hydrogenation?
1452
views
Domanda del libro di testo
How many 𝝅 electrons are involved in the conjugated system for each of the following molecules?
(a)
1302
views