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:**Question 22**
Draw the Newman projection of the below compound down the C2-C3 bond.
The given structure represents a specific conformation of a molecule. The structure includes several substituents on a carbon chain:
- On the carbon labeled with a *wedge* bond:
- Bromine (Br) represented on the left
- Propyl group (a carbon chain of 3 atoms) extending upward
- Methyl group (CH₃) extending downward
- On the opposite side of the bond (carbon labeled with a *dash* bond):
- Hydrogen (H) extending upward
- Fluorine (F) extending downward
To draw the Newman projection, we need to visualize the molecule looking straight down the C2-C3 bond:
1. **On the front carbon (C2):**
- Bromine (Br) attached at the left (equivalent of 120° rotation)
- Ethyl group extending upward (equivalent of 0° rotation)
- Methyl group (CH₃) extending downward (equivalent of 240° rotation)
2. **On the rear carbon (C3):**
- Hydrogen (H) extending upward (equivalent of 0° rotation)
- Fluorine (F) extending downward (equivalent of 240° rotation)
This detailed understanding of substituent positioning is crucial for drawing the Newman projection accurately.
**Graphical Representation (Detailed Explanation):**
To explain the Newman projection:
1. **Front Carbon (C2):**
- **Visualize a circle with three substituents radiating from the center, representing bonds at 120° angles.**
2. **Rear Carbon (C3):**
- **A second set of three bonds coming from behind the circle, also separated by 120°.**
Each substituent’s respective position (angle) must be accurately represented to visualize the molecular conformation.
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