Domanda del libro di testo
Write structural formulas for the following compounds (includes both old- and new-style names).
(d) cyclohexylacetylene
(e) 5-methyl-3-octyne
(f) trans-3,5-dibromocyclodecyne
1174
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Ch.9 - Alkynes
Wade9th EditionOrganic ChemistryISBN: 9780135213728
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TOC.tableOfContents
- Ch.1 - Structure and Bonding107
- Ch. 2 - Acids and Bases; Functional Groups115
- Ch.3 - Structure and Stereochemistry of Alkanes100
- Ch.4 - The Study of Chemical Reactions99
- Ch.5 - Stereochemistry93
- Ch.6 - Alkyl Halides; Nucleophilic Substitution118
- Ch. 7 - Structure and Synthesis of Alkenes; Elimination158
- Ch.8 - Reactions of Alkenes171
- Ch.9 - Alkynes91
- Ch.10 - Structure and Synthesis of Alcohols143
- Ch.11 - Reactions of Alcohols104
- Ch. 12 - Infrared Spectroscopy and Mass Spectrometry22
- Ch. 13 - Nuclear Magnetic Resonance Spectroscopy45
- Ch. 14 - Ethers, Epoxides, and Thioethers72
- Ch. 15 - Conjugated Systems, Orbital Symmetry, and Ultraviolet Spectroscopy89
- Ch. 16 - Aromatic Compounds74
- Ch. 17 - Reactions of Aromatic Compounds126
- Ch. 18 - Ketones and Aldehydes193
- Ch. 19 - Amines129
- Ch. 20 - Carboxylic Acids77
- Ch. 21 - Carboxylic Acid Derivatives141
- Ch. 22 - Condensations and Alpha Substitutions of Carbonyl Compounds175
- Ch. 23 - Carbohydrates and Nucleic Acids93
- Ch. 24 - Amino Acids, Peptides, and Proteins54
Capitolo 9, Problema 26g,h,i
Write structural formulas for the following compounds (includes both old- and new-style names).
g. 5,5-dibromo-4-phenylcyclooct-1-yne
h. (E)-6-ethyloct-2-en-4-yne
i.1,4-heptadiyne
Guida verificata passo dopo passo1
To write the structural formula for 5,5-dibromo-4-phenylcyclooct-1-yne, start by identifying the main structure: cyclooctyne. This is a cyclooctane ring with a triple bond at the 1-position. Draw an eight-membered ring and place a triple bond between the first and second carbon atoms.
Next, add the substituents to the cyclooctyne structure. At the 4-position, attach a phenyl group, which is a benzene ring. At the 5-position, add two bromine atoms (dibromo). Ensure the bromine atoms are on the same carbon.
For (E)-6-ethyloct-2-en-4-yne, start with the octane backbone, which is a straight chain of eight carbon atoms. Identify the positions of the double and triple bonds: a double bond at the 2-position and a triple bond at the 4-position. The (E) configuration indicates that the highest priority groups on either side of the double bond are on opposite sides.
Add the ethyl group at the 6-position. An ethyl group is a two-carbon chain, CH₃CH₂. Ensure the double bond has the correct (E) configuration by placing the ethyl group and the hydrogen on opposite sides of the double bond.
For 1,4-heptadiyne, start with a seven-carbon chain (heptane). Place triple bonds at the 1-position and the 4-position. This means the first and second carbons are connected by a triple bond, and the fourth and fifth carbons are connected by another triple bond. Ensure the rest of the carbon atoms are connected by single bonds.
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IUPAC Nomenclature
IUPAC nomenclature is a systematic method of naming organic chemical compounds as recommended by the International Union of Pure and Applied Chemistry. It provides a standardized way to name compounds based on their structure, ensuring clear communication among chemists. Understanding IUPAC rules is essential for interpreting and constructing structural formulas from names.
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03:43
The different parts of an IUPAC name
Functional Groups
Functional groups are specific groups of atoms within molecules that are responsible for the characteristic chemical reactions of those molecules. Recognizing functional groups such as alkynes, alkenes, and phenyl groups is crucial for drawing structural formulas, as they dictate the connectivity and reactivity of the compound.
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02:36Identifying Functional Groups
Stereochemistry
Stereochemistry involves the study of the spatial arrangement of atoms in molecules and its impact on chemical behavior. Terms like (E)- and (Z)- refer to the configuration of double bonds, indicating the relative positions of substituents. Understanding stereochemistry is vital for accurately representing compounds with geometric isomers, such as alkenes.
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Percorso guidato
1:38Polymer Stereochemistry Concept 1
Pratica correlata
Domanda del libro di testo
Write structural formulas for the following compounds (includes both old- and new-style names).
(a) 2-octyne
(b) ethylisopentylacetylene
(c) ethynylbenzene
1519
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Domanda del libro di testo
Write structural formulas for the following compounds (includes both old- and new-style names).
(j) vinylacetylene
(k) (S)-3-methyl-1-penten-4-yne
1672
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Domanda del libro di testo
Give common names for the following compounds.
(a) CH3–C≡C–CH2CH3
(b) Ph–C≡C–H
1221
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Domanda del libro di testo
Give common names for the following compounds.
(c) 3-methyloct-4-yne
(d) (CH3)3C–C≡C–CH(CH3)CH2CH3
1145
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Domanda del libro di testo
Develop syntheses for the following compounds, using acetylene and compounds containing no more than four carbon atoms as your organic starting materials.
(b) cis-1-ethyl-2-methylcyclopropane
637
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