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

18. Aromaticity

Naming Benzene Rings

Organic Chemistry

18. Aromaticity

Naming Benzene Rings

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4:37 minutes

Problem 45h

Textbook Question

Draw the structure for each of the following:
h. 2,4-dichloromethylbenzene

Verified step by step guidance

Identify the parent structure: The name '2,4-dichloromethylbenzene' indicates that the parent structure is benzene, which is a six-membered aromatic ring with alternating double bonds.

Determine the substituents: The name specifies two substituents, both of which are chloromethyl groups (-CH2Cl). These groups are attached to the benzene ring.

Assign the positions of the substituents: The numbers '2' and '4' indicate the positions on the benzene ring where the chloromethyl groups are attached. Position '1' is typically assigned to one of the carbons in the benzene ring, and the numbering proceeds around the ring to minimize the locants.

Draw the benzene ring: Represent the benzene ring as a hexagon with alternating double bonds. Ensure that the positions '2' and '4' are clearly marked for substituent placement.

Attach the substituents: At position '2', draw a -CH2Cl group attached to the benzene ring. Similarly, at position '4', attach another -CH2Cl group. Verify that the structure matches the name '2,4-dichloromethylbenzene'.

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Key Concepts

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

Benzene Structure

Benzene is a cyclic hydrocarbon with a formula of C6H6, characterized by a ring of six carbon atoms with alternating double bonds, often represented as a hexagon with a circle inside. This structure exhibits resonance, meaning the electrons are delocalized, contributing to its stability and unique chemical properties. Understanding the basic structure of benzene is essential for drawing substituted derivatives like 2,4-dichloromethylbenzene.

Substitution Reactions

In organic chemistry, substitution reactions involve replacing one atom or group in a molecule with another. In the case of benzene derivatives, electrophilic aromatic substitution is a common mechanism where substituents like chlorine can replace hydrogen atoms on the benzene ring. Recognizing how and where substitutions occur is crucial for accurately drawing the structure of compounds like 2,4-dichloromethylbenzene.

Nomenclature of Organic Compounds

The IUPAC nomenclature system provides a standardized way to name organic compounds based on their structure. For 2,4-dichloromethylbenzene, the name indicates that two chlorine atoms are attached to the benzene ring at the 2nd and 4th positions, and a methyl group is also present. Familiarity with this naming convention is vital for interpreting and constructing chemical structures correctly.

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