Basic Concepts
In a nutshell: Functional groups define the properties of organic molecules, and nomenclature helps us communicate their structures.
## Functional Groups: The Chemical Personalities
Functional groups are specific clusters of atoms that give organic molecules their unique properties and reactivity. Think of them as the molecule's 'personality'.
### Common Functional Groups
- **Alcohols**: Contain an -OH group (like ethanol).
- **Carboxylic Acids**: Have a -COOH group (like acetic acid).
- **Amines**: Feature an -NH\(_2\) group.
- **Alkenes and Alkynes**: Have double or triple bonds.
### Naming Organic Compounds
The International Union of Pure and Applied Chemistry (IUPAC) sets the rules for naming organic compounds. Names are based on:
- The longest carbon chain
- The type and position of functional groups
- Numbering the carbons for the lowest possible numbers
## Why It Matters
Knowing the name tells you the structure—and the structure tells you how it might react!
Examples
- Ethanol (\(CH_3CH_2OH\)) is an alcohol used in beverages and hand sanitizers.
- Acetic acid (\(CH_3COOH\)) gives vinegar its sour taste.