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

12. Alcohols, Ethers, Epoxides and Thiols

Naming Epoxides

Organic Chemistry

12. Alcohols, Ethers, Epoxides and Thiols

Naming Epoxides

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4:09 minutes

Problem 31g,h,i

Textbook Question

Give IUPAC names for the following compounds.
(g)
(h)
(i)

Verified step by step guidance

Step 1: Analyze the structure in image (g). The compound is a three-membered cyclic ether (epoxide) with substituents. Identify the parent chain as the epoxide ring and determine the substituents attached to it. The substituents are a methoxy group (-OCH3), an ethyl group (-CH2CH3), and two hydrogens.

Step 2: Assign locants to the substituents on the epoxide ring. Number the ring starting from the oxygen atom to minimize the locants of the substituents. The methoxy group is at position 1, the ethyl group is at position 2, and the hydrogens are at positions 2 and 3.

Step 3: Name the substituents and combine them with the parent name. The parent name for a three-membered cyclic ether is 'oxirane.' Include the substituents in alphabetical order with their locants.

Step 4: Analyze the structure in image (h). The compound is a two-membered cyclic ether (oxirane) with a bromine atom attached. Number the ring starting from the oxygen atom to minimize the locant of the bromine substituent.

Step 5: Analyze the structure in image (i). The compound is a six-membered cyclic ether with two oxygen atoms in the ring. This is a dioxane derivative. Number the ring to assign locants to the oxygen atoms and any substituents, ensuring the lowest possible locants.

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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 organic compounds.

Functional Groups

Functional groups are specific groups of atoms within molecules that are responsible for the characteristic chemical reactions of those molecules. Recognizing functional groups is crucial for determining the properties and reactivity of organic compounds, as they dictate how the compound behaves in chemical reactions and influence the naming process.

Structural Isomerism

Structural isomerism occurs when compounds have the same molecular formula but different structural arrangements of atoms. This concept is important in IUPAC naming, as different isomers can have distinct names and properties. Understanding how to identify and differentiate between structural isomers is key to providing accurate IUPAC names.

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