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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4:31 minutes

Problem 41e,f

Textbook Question

What is each compound's systematic name?
e.
f.

Verified step by step guidance

Step 1: Analyze the structure in image A. The compound is a cyclic structure with alternating double bonds, indicating it is aromatic. Count the number of carbons in the ring to determine the base name. The ring contains 8 carbons, making it an octa- structure. The methyl group (CH₃) is attached to the ring, so the compound is a methyl-substituted aromatic ring.

Step 2: Assign the position of the methyl group in image A. Number the carbons in the ring starting from the position that gives the substituent the lowest possible number. Since there is only one substituent, the methyl group is at position 1. Combine the substituent name (methyl) with the base name (cyclooctatriene) to form the systematic name.

Step 3: Analyze the structure in image B. The compound is a five-membered ring with one double bond, indicating it is an alkene. The ring contains a bromine atom and a methyl group as substituents. Count the carbons in the ring to determine the base name. The ring contains 5 carbons, making it a cyclopentene structure.

Step 4: Assign the positions of the substituents in image B. Number the carbons in the ring starting from the double bond and moving in the direction that gives the substituents the lowest possible numbers. The bromine atom and methyl group are attached to different carbons. Determine their positions based on the numbering.

Step 5: Combine the substituent names (bromo and methyl) with the base name (cyclopentene) to form the systematic name. Ensure the substituents are listed in alphabetical order and include their positions in the name.

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Key Concepts

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

IUPAC Nomenclature

IUPAC nomenclature is a systematic method for naming organic chemical compounds. It provides rules for naming based on the structure of the molecule, including the longest carbon chain, functional groups, and substituents. Understanding these rules is essential for accurately identifying and communicating the identity of compounds.

Alkenes and Aromatic Compounds

Alkenes are hydrocarbons that contain at least one carbon-carbon double bond, while aromatic compounds are cyclic structures that follow Huckel's rule, typically containing alternating double bonds. Recognizing the type of compound is crucial for determining the correct naming conventions and understanding their chemical behavior.

Substituent Positioning

In organic chemistry, the position of substituents on a carbon chain or ring significantly affects the compound's name and properties. The numbering of the carbon atoms is essential to indicate the location of substituents, ensuring clarity in communication and understanding of the compound's structure.

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