Citing down the C3-C4 bond, and using the drawings below, complete the Newman projections for all staggered and eclipsed conformations of hexane. Which staggered conformation has the lowest energy? Which eclipsed conformation has the highest energy?

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Citing down the C3-C4 bond, and using the drawings below, complete the Newman projections for all staggered and eclipsed conformations of hexane. Which staggered conformation has the lowest energy? Which eclipsed conformation has the highest energy?

This image shows a series of Newman projections illustrating the staggered and eclipsed conformations of a molecule, likely ethane or a similar compound, as it undergoes rotation around a carbon-carbon single bond. Each Newman projection is labeled with the angle of rotation and a Roman numeral. Here's a detailed explanation:

1. **0° (I)**
   - Eclipsed conformation where the front and back CH₃ groups and hydrogen atoms are aligned.
   
2. **60° (II)**
   - Staggered conformation where the CH₃ group is 60° apart from the front hydrogen atoms.

3. **120° (III)**
   - Another eclipsed conformation where the CH₃ groups and hydrogen atoms align differently, creating potential steric strain.

4. **180° (IV)**
   - A fully anti-conformation where CH₃ groups are directly opposite each other, minimizing steric hindrance.

5. **240° (V)**
   - Eclipsed conformation similar to 120° but rotated further.

6. **300° (VI)**
   - Staggered conformation similar to 60° but rotated further.

7. **360° (VII)**
   - Identical to the 0° position, completing a full rotation.

These diagrams demonstrate the concept of torsional strain and its effects on molecular stability. In general, staggered conformations (e.g., 60° and 300°) are more stable than eclipsed conformations (e.g., 0°, 120°, 240°) due to reduced electron repulsion.
Transcribed Image Text:This image shows a series of Newman projections illustrating the staggered and eclipsed conformations of a molecule, likely ethane or a similar compound, as it undergoes rotation around a carbon-carbon single bond. Each Newman projection is labeled with the angle of rotation and a Roman numeral. Here's a detailed explanation: 1. **0° (I)** - Eclipsed conformation where the front and back CH₃ groups and hydrogen atoms are aligned. 2. **60° (II)** - Staggered conformation where the CH₃ group is 60° apart from the front hydrogen atoms. 3. **120° (III)** - Another eclipsed conformation where the CH₃ groups and hydrogen atoms align differently, creating potential steric strain. 4. **180° (IV)** - A fully anti-conformation where CH₃ groups are directly opposite each other, minimizing steric hindrance. 5. **240° (V)** - Eclipsed conformation similar to 120° but rotated further. 6. **300° (VI)** - Staggered conformation similar to 60° but rotated further. 7. **360° (VII)** - Identical to the 0° position, completing a full rotation. These diagrams demonstrate the concept of torsional strain and its effects on molecular stability. In general, staggered conformations (e.g., 60° and 300°) are more stable than eclipsed conformations (e.g., 0°, 120°, 240°) due to reduced electron repulsion.
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