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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5:28 minutes

Problem 55g,h,i

Textbook Question

How many of the following names are correct? Correct the incorrect names.
g. 2-ethyl-2-butene
h. (E)-2-methyl-1-hexene
i. 2-methylcyclopentene

Verified step by step guidance

Step 1: Analyze the name '2-ethyl-2-butene'. In IUPAC nomenclature, the parent chain should be the longest continuous chain containing the double bond. Check if 'butene' is the correct parent chain and if the substituent 'ethyl' is correctly placed. If not, rename the compound accordingly.

Step 2: Examine the name '(E)-2-methyl-1-hexene'. The '(E)' designation indicates the stereochemistry of the double bond. Verify if the highest priority groups on either side of the double bond are correctly assigned according to the Cahn-Ingold-Prelog priority rules. If the stereochemistry is incorrect, correct it.

Step 3: Review the name '2-methylcyclopentene'. In cyclic alkenes, the double bond is given the lowest possible locant. Confirm if the numbering of the double bond and substituent is correct. If not, adjust the name to reflect the correct numbering.

Step 4: Count how many of the given names are correct after verifying each one against IUPAC nomenclature rules. Identify the incorrect names and provide their corrected versions.

Step 5: Summarize the findings by stating how many names are correct and listing the corrected names for the ones that were incorrect.

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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 stereochemistry. Understanding these rules is essential for determining the correctness of compound names and making necessary corrections.

Stereochemistry

Stereochemistry refers to the study of the spatial arrangement of atoms in molecules and how this affects their chemical behavior. In the context of naming compounds, designations like (E) and (Z) indicate the configuration of double bonds. Recognizing stereochemical descriptors is crucial for accurately interpreting and correcting names involving geometric isomers.

Cycloalkenes

Cycloalkenes are cyclic hydrocarbons that contain at least one carbon-carbon double bond. Their naming follows specific IUPAC rules, which include identifying the ring structure and the position of the double bond. Understanding the characteristics of cycloalkenes is important for evaluating the correctness of names like '2-methylcyclopentene' and ensuring proper nomenclature.

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