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 Alkenes

GOB Chemistry

13. Alkenes, Alkynes, and Aromatic Compounds

Naming Alkenes

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Problem 31a

Textbook Question

Draw the condensed structural formula for each of the following:
a. trans-1-bromo-2-chloroethene

Verified step by step guidance

Step 1: Understand the structure of ethene (C₂H₄), which is a two-carbon molecule with a double bond between the carbons. The double bond restricts rotation, making it possible to have cis and trans isomers.

Step 2: Recognize that 'trans' means the substituents are on opposite sides of the double bond. In this case, the substituents are bromine (Br) and chlorine (Cl).

Step 3: Assign the substituents to the correct carbons. Bromine (Br) is attached to one carbon, and chlorine (Cl) is attached to the other carbon. Ensure they are positioned on opposite sides of the double bond to satisfy the 'trans' configuration.

Step 4: Write the condensed structural formula. Start with the carbon backbone (C=C), then add the substituents. For the trans configuration, one carbon will have Br and H, while the other will have Cl and H. Arrange them to reflect the opposite sides of the double bond.

Step 5: Combine everything into the condensed structural formula. The result should look like: HBrC=CHCl, where Br and Cl are on opposite sides of the double bond.

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Key Concepts

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

Condensed Structural Formula

A condensed structural formula is a way of representing a chemical compound that shows the arrangement of atoms and the connectivity between them without depicting all the bonds explicitly. It typically uses symbols for atoms and groups them to indicate how they are connected, making it easier to visualize the structure of the molecule in a compact form.

Geometric Isomerism

Geometric isomerism occurs in compounds with restricted rotation around a double bond, leading to different spatial arrangements of atoms. In the case of trans-1-bromo-2-chloroethene, the 'trans' designation indicates that the bromine and chlorine substituents are on opposite sides of the double bond, which affects the compound's physical and chemical properties.

Nomenclature of Organic Compounds

The nomenclature of organic compounds follows specific rules set by the International Union of Pure and Applied Chemistry (IUPAC). For trans-1-bromo-2-chloroethene, the name indicates the presence of a double bond (ethene), the positions of the substituents (1 and 2), and the types of substituents (bromo and chloro), which are essential for accurately drawing its structure.