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

16. Carboxylic Acids and Their Derivatives

Naming Esters

GOB Chemistry

16. Carboxylic Acids and Their Derivatives

Naming Esters

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2:31 minutes

Problem 79a

Textbook Question

Propyl acetate is the ester that gives the odor and smell of pears.
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a. Draw the condensed structural formula for propyl acetate.

Verified step by step guidance

Understand the structure of an ester: Esters are organic compounds with the general formula RCOOR', where R and R' are alkyl or aryl groups. The functional group of an ester is -COO-.

Identify the components of propyl acetate: The name 'propyl acetate' indicates that it is an ester formed from propanol (propyl group) and acetic acid (acetate group). The propyl group (C3H7) is attached to the oxygen atom of the ester functional group, while the acetate group (CH3CO-) forms the other part of the molecule.

Write the condensed structural formula for the acetate group: The acetate group is derived from acetic acid (CH3COOH) by removing the hydrogen atom from the hydroxyl group (-OH). Its condensed structural formula is CH3CO-.

Write the condensed structural formula for the propyl group: The propyl group is a three-carbon alkyl group with the formula C3H7. It can be written as CH3CH2CH2- when attached to the oxygen atom of the ester functional group.

Combine the two groups to form the condensed structural formula of propyl acetate: Attach the propyl group (CH3CH2CH2-) to the oxygen atom of the acetate group (CH3CO-). The resulting condensed structural formula is CH3COOCH2CH2CH3.

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Key Concepts

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

Ester Functional Group

An ester is a chemical compound formed from the reaction between an alcohol and a carboxylic acid, characterized by the functional group -COO-. Esters are known for their distinctive odors and are commonly found in natural and synthetic flavors and fragrances. Understanding the structure of esters is crucial for drawing their condensed structural formulas.

Condensed Structural Formula

A condensed structural formula is a way of representing a chemical compound that shows the arrangement of atoms in a molecule without depicting all the bonds explicitly. It typically groups atoms together to indicate how they are connected, making it easier to visualize the molecular structure. For propyl acetate, the condensed formula will reflect its ester nature and the specific arrangement of carbon, hydrogen, and oxygen atoms.

Chemical Nomenclature

Chemical nomenclature is the systematic naming of chemical compounds based on their structure and functional groups. For esters, the name is derived from the alcohol and the acid used in its formation. In the case of propyl acetate, the name indicates that it is derived from propanol (the alcohol) and acetic acid (the acid), which is essential for understanding its properties and reactivity.

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