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

Cis vs Trans

Organic Chemistry

4. Alkanes and Cycloalkanes

Cis vs Trans

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2:46 minutes

Problem 15b

Textbook Question

Name the following alkenes.
(b)

Verified step by step guidance

Step 1: Identify the longest continuous carbon chain that contains the double bond. This will serve as the parent chain and determine the base name of the alkene.

Step 2: Number the carbon atoms in the parent chain starting from the end closest to the double bond. This ensures the double bond gets the lowest possible number.

Step 3: Locate the position of the double bond and include its number in the name. For example, if the double bond starts at carbon 2, the name will include '2-ene'.

Step 4: Identify and name any substituents (side groups) attached to the parent chain. Use prefixes like 'methyl-', 'ethyl-', etc., and assign their positions based on the numbering of the parent chain.

Step 5: Combine the substituent names, the position of the double bond, and the parent chain name into the final IUPAC name, ensuring proper alphabetical order for substituents and correct placement of numbers.

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Key Concepts

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

Alkenes

Alkenes are hydrocarbons that contain at least one carbon-carbon double bond (C=C). They are unsaturated compounds, meaning they have fewer hydrogen atoms than alkanes, which are saturated. The presence of the double bond gives alkenes unique reactivity and isomerism, making them important in organic synthesis and industrial applications.

Nomenclature

Nomenclature in organic chemistry refers to the systematic naming of chemical compounds based on established rules. For alkenes, the IUPAC naming convention involves identifying the longest carbon chain containing the double bond, numbering the chain to give the double bond the lowest possible number, and using suffixes like '-ene' to indicate the presence of the double bond.

Geometric Isomerism

Geometric isomerism, also known as cis-trans isomerism, occurs in alkenes due to the restricted rotation around the carbon-carbon double bond. This leads to different spatial arrangements of substituents attached to the double-bonded carbons. Understanding geometric isomerism is crucial for naming alkenes accurately, as it affects their physical and chemical properties.

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