Table of contents

1. A Review of General Chemistry5h 5m
2. Molecular Representations1h 14m
3. Acids and Bases2h 46m
4. Alkanes and Cycloalkanes4h 17m
5. Chirality3h 39m
6. Thermodynamics and Kinetics1h 22m
7. Substitution Reactions1h 48m
8. Elimination Reactions2h 30m
9. Alkenes and Alkynes2h 9m
10. Addition Reactions3h 19m
11. Radical Reactions1h 58m
12. Alcohols, Ethers, Epoxides and Thiols2h 42m
13. Alcohols and Carbonyl Compounds2h 17m
14. Synthetic Techniques1h 26m
15. Analytical Techniques:IR, NMR, Mass Spect7h 3m
16. Conjugated Systems6h 13m
17. Ultraviolet Spectroscopy51m
18. Aromaticity2h 34m
19. Reactions of Aromatics: EAS and Beyond5h 1m
20. Phenols55m
21. Aldehydes and Ketones: Nucleophilic Addition4h 56m
22. Carboxylic Acid Derivatives: NAS2h 51m
23. The Chemistry of Thioesters, Phophate Ester and Phosphate Anhydrides1h 10m
24. Enolate Chemistry: Reactions at the Alpha-Carbon1h 53m
25. Condensation Chemistry2h 9m
26. Amines1h 43m
27. Heterocycles2h 0m
28. Carbohydrates5h 53m
29. Amino Acids4h 20m
30. Peptides and Proteins2h 42m
31. Catalysis in Organic Reactions1h 30m
32. Lipids 2h 50m
33. The Organic Chemistry of Metabolic Pathways2h 52m
34. Nucleic Acids1h 32m
35. Transition Metals6h 14m
36. Synthetic Polymers1h 49m

4. Alkanes and Cycloalkanes

Naming Alkenes

Organic Chemistry

4. Alkanes and Cycloalkanes

Naming Alkenes

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3:32 minutes

Problem 27c

Textbook Question

Identify the allylic carbon(s) in the following molecules.
(c)

Verified step by step guidance

Step 1: Understand the concept of allylic carbons. Allylic carbons are the carbons directly adjacent to a carbon-carbon double bond (C=C). These carbons are often involved in resonance stabilization due to their proximity to the π-electrons of the double bond.

Step 2: Examine the molecule provided. Identify all the carbon-carbon double bonds (C=C) in the structure. In this molecule, there are two double bonds present.

Step 3: Locate the carbons directly adjacent to each double bond. For each double bond, look at the carbons that are bonded to the sp2-hybridized carbons forming the double bond.

Step 4: Highlight the allylic carbons. For the first double bond on the left, the allylic carbons are the ones directly connected to the sp2 carbons of the double bond. Similarly, for the second double bond on the right, identify the carbons directly adjacent to the sp2 carbons.

Step 5: Verify your identification. Ensure that the carbons you have identified are indeed adjacent to the double bonds and not part of the double bond itself. These allylic carbons are important in reactions such as allylic substitution and resonance stabilization.

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Allylic Carbons

Allylic carbons are the carbon atoms that are directly adjacent to a carbon-carbon double bond (alkene). In a molecule, these carbons are significant because they can participate in various chemical reactions, such as allylic substitution, due to their unique reactivity. Identifying allylic carbons is crucial for understanding reaction mechanisms and predicting the behavior of organic compounds.

Alkenes

Alkenes are hydrocarbons that contain at least one carbon-carbon double bond. This double bond is responsible for the unsaturation in the molecule, which affects its reactivity and physical properties. The presence of alkenes in a structure often indicates potential sites for chemical reactions, making them important in organic synthesis and industrial applications.

Structural Representation

Structural representation in organic chemistry refers to the way molecules are depicted, showing the arrangement of atoms and the bonds between them. Understanding these representations, such as Lewis structures or skeletal formulas, is essential for visualizing molecular geometry and predicting reactivity. Accurate interpretation of these structures allows chemists to identify functional groups and key features like allylic positions.

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