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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6:15 minutes

Problem 43d,e,f

Textbook Question

Draw the skeletal structures for the compounds in Problem 42.
d. vinyl bromide
e. 1,2-dimethylcyclopentene
f. diallylamine

Verified step by step guidance

Step 1: Understand the naming conventions for each compound. For 'vinyl bromide,' the 'vinyl' group refers to an ethene group (CH₂=CH-) attached to another atom or group. Bromide indicates the presence of a bromine atom.

Step 2: Draw the skeletal structure for vinyl bromide. Start with the ethene backbone (CH₂=CH-) and attach a bromine atom to one of the carbons in the double bond.

Step 3: For '1,2-dimethylcyclopentene,' recognize that the base structure is cyclopentene, a five-membered ring with one double bond. The '1,2-dimethyl' indicates two methyl groups attached to the first and second carbons of the ring.

Step 4: Draw the skeletal structure for 1,2-dimethylcyclopentene. Begin with a five-membered ring containing one double bond, then add methyl groups (-CH₃) to the first and second carbons of the ring.

Step 5: For 'diallylamine,' note that 'allyl' refers to the CH₂=CH-CH₂- group. 'Diallyl' means two allyl groups are attached to the amine (NH₂). Draw the skeletal structure by connecting two allyl groups to the nitrogen atom of the amine.

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Key Concepts

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

Skeletal Structures

Skeletal structures are simplified representations of organic molecules that depict the arrangement of atoms and bonds without showing all the hydrogen atoms explicitly. In these diagrams, carbon atoms are represented by vertices or line ends, while bonds are shown as lines. This notation helps chemists visualize molecular structure and connectivity efficiently.

Vinyl Compounds

Vinyl compounds are organic molecules that contain a vinyl group, which is characterized by the presence of a carbon-carbon double bond (C=C) adjacent to a carbon atom that is bonded to another substituent. Vinyl bromide, for example, has a bromine atom attached to a vinyl group, making it a key compound in various chemical reactions, including polymerization.

Cycloalkenes

Cycloalkenes are cyclic hydrocarbons that contain at least one carbon-carbon double bond within the ring structure. In the case of 1,2-dimethylcyclopentene, the compound features a five-membered carbon ring with two methyl groups attached to the first and second carbon atoms. Understanding the geometry and reactivity of cycloalkenes is essential for predicting their behavior in chemical reactions.

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Related Practice

Textbook Question

The following names are all incorrect. Draw the structure represented by the incorrect name (or a consistent structure if the name is ambiguous), and give your drawing the correct name.

e. 2,5-dimethylcyclohexene