Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Transcribed Image Text:### IUPAC Nomenclature for Organic Compounds
#### Exercise: Naming Complex Organic Compounds
**Problem Statement:**
Give a systematic (IUPAC) name for the following compound.
*Diagram of the Organic Compound:*
The diagram depicts an organic molecule with the following structure:
```
CH3
|
CH3—CH—CH3
|
CH3—CH—CH2—CH—CH3
| |
CH2 CH—CH3
| |
CH3 CH2—CH3
```
**Explanation of the Diagram:**
The provided structure is a branched alkane. Here's a detailed breakdown to assist you in naming the compound systematically:
- Identify the longest continuous carbon chain in the molecule.
- Number the carbon atoms in this chain from the end nearest a substituent.
- Identify and name the substituents.
- Assign a locant (numerical position) to each substituent according to its position on the principal chain.
- Combine the substituents' names and locants with the name of the principal chain.
**Step-by-Step IUPAC Naming Process:**
1. **Identify the Longest Chain:**
The longest chain in this molecule has 6 carbon atoms. Therefore, the base name will be "hexane".
2. **Number the Carbon Chain:**
Number the chain from the end closest to the first branch point. In this molecule, it makes sense to start from the left, giving the first branch the lowest possible number.
3. **Identify and Name Substituents:**
- A methyl group (CH₃) at positions 2, 2, 4, and 6.
- An ethyl group (C₂H₅) at position 3.
4. **Assign Numbers to Substituents:**
Combine the locants with the substituents names:
- At position 2: two methyl groups (3 carbon chains, i.e., ethyl group).
- At position 3: one methyl group.
- At position 3: ethyl group.
- At position 4: one ethyl group.
5. **Construct the IUPAC Name:**
Combine the substituents names (in alphabetical order) with their respective locants and the base name in a single word. When multiple substituents of the same
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