Table of contents

1. Matter and Measurements4h 31m
2. Atoms and the Periodic Table5h 23m
3. Ionic Compounds2h 18m
4. Molecular Compounds2h 18m
5. Classification & Balancing of Chemical Reactions3h 17m
6. Chemical Reactions & Quantities2h 27m
7. Energy, Rate and Equilibrium3h 46m
8. Gases, Liquids and Solids3h 25m
9. Solutions4h 10m
10. Acids and Bases3h 29m
11. Nuclear Chemistry56m
BONUS: Lab Techniques and Procedures1h 38m
BONUS: Mathematical Operations and Functions47m
12. Introduction to Organic Chemistry1h 34m
13. Alkenes, Alkynes, and Aromatic Compounds2h 12m
14. Compounds with Oxygen or Sulfur1h 6m
15. Aldehydes and Ketones1h 1m
16. Carboxylic Acids and Their Derivatives1h 11m
17. Amines39m
18. Amino Acids and Proteins1h 51m
19. Enzymes1h 37m
20. Carbohydrates1h 41m
21. The Generation of Biochemical Energy2h 8m
22. Carbohydrate Metabolism2h 22m
23. Lipids2h 26m
24. Lipid Metabolism1h 45m
25. Protein and Amino Acid Metabolism1h 37m
26. Nucleic Acids and Protein Synthesis2h 54m

13. Alkenes, Alkynes, and Aromatic Compounds

Naming Benzene

GOB Chemistry

13. Alkenes, Alkynes, and Aromatic Compounds

Naming Benzene

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Problem 70a,b

Textbook Question

The following names are incorrect by IUPAC rules. Draw the structures represented by the following names, and write their correct names. Label each as being symmetrically or unsymmetrically substituted.
a. 2-Methyl-4-hexene
b. 1,3-Dimethyl-1-hexyne

Verified step by step guidance

Step 1: Understand the problem. The task is to identify the errors in the given names according to IUPAC nomenclature rules, draw the structures based on the incorrect names, and then rename them correctly. Additionally, determine whether the compounds are symmetrically or unsymmetrically substituted.

Step 2: Analyze the first compound, '2-Methyl-4-hexene.' According to IUPAC rules, the parent chain should be the longest continuous chain containing the double bond. Number the chain such that the double bond gets the lowest possible number. Draw the structure based on the given name, ensuring the double bond is at position 4 and a methyl group is at position 2.

Step 3: Correct the name for '2-Methyl-4-hexene.' Check the numbering of the chain to ensure the double bond has the lowest possible number. If necessary, rename the compound by reassigning the position of the double bond and substituents. Determine if the substituents are symmetrically or unsymmetrically distributed.

Step 4: Analyze the second compound, '1,3-Dimethyl-1-hexyne.' According to IUPAC rules, the parent chain should be the longest continuous chain containing the triple bond. Number the chain such that the triple bond gets the lowest possible number. Draw the structure based on the given name, ensuring the triple bond is at position 1 and methyl groups are at positions 1 and 3.

Step 5: Correct the name for '1,3-Dimethyl-1-hexyne.' Check the numbering of the chain to ensure the triple bond has the lowest possible number. If necessary, rename the compound by reassigning the position of the triple bond and substituents. Determine if the substituents are symmetrically or unsymmetrically distributed.

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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 chemical compounds, ensuring that each name conveys specific information about the structure of the molecule. It includes rules for identifying the longest carbon chain, the position of functional groups, and the correct use of prefixes and suffixes. Understanding these rules is essential for accurately interpreting and correcting the names provided in the question.

Structural Representation

Structural representation involves drawing the molecular structure of a compound based on its name. This includes depicting the arrangement of atoms, bonds, and any functional groups. For the names given, one must visualize and sketch the correct structures to identify any discrepancies in the original names and to determine whether they are symmetrically or unsymmetrically substituted.

Substitution Patterns

Substitution patterns refer to the arrangement of substituents on a carbon chain, which can be classified as symmetrical or unsymmetrical. Symmetrical substitution means that substituents are arranged evenly around the central carbon chain, while unsymmetrical substitution indicates an uneven distribution. Recognizing these patterns is crucial for labeling the structures correctly after drawing them.

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