CH3 or or CH3 or OCH3 or or -S. or ОН or or +

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### Exercise 4: Determining the More Stable Structure

Identify the more stable structure in each of the following pairs:

1. **Square vs. Chain**
   - A square structure is contrasted with a straight chain of four carbon atoms.

2. **Chair Conformation with Methyl Group**
   - A cyclohexane ring with a methyl group in axial position is compared to one with a methyl group in equatorial position.

3. **Carbon Chain Stability**
   - A three-carbon chain with a positive charge at the central carbon atom is compared to a similar structure with the positive charge at the terminal carbon.

4. **Carbon Chain with Methyl Group**
   - A three-carbon chain with a methyl group in a staggered conformation is compared against one in an eclipsed formation.

5. **Carbon Chain with Positive Charge**
   - A two-carbon chain with a positive charge is compared against a similar structure with a methoxy group (OCH3) attached to the carbon.

6. **Oxygen and Sulfur Stability**
   - A ketone (C=O) with negative charge on the oxygen is compared to a chain with negative charge on a sulfur atom.

7. **Alcohol vs. Ketone**
   - A chain with an alcohol group (OH) is compared to one with a ketone group (C=O).

8. **Anion Stability: Oxygen vs. Sulfur**
   - A four-carbon chain with a negatively charged oxygen is compared to a similar structure with a negatively charged sulfur.

9. **Alkene Chains**
   - Two structures, each with a four-carbon chain, one with a double bond at different positions.

Evaluate which structure in each pair is likely to be more stable based on factors such as electron distribution, steric hindrance, and molecular conformation.
Transcribed Image Text:### Exercise 4: Determining the More Stable Structure Identify the more stable structure in each of the following pairs: 1. **Square vs. Chain** - A square structure is contrasted with a straight chain of four carbon atoms. 2. **Chair Conformation with Methyl Group** - A cyclohexane ring with a methyl group in axial position is compared to one with a methyl group in equatorial position. 3. **Carbon Chain Stability** - A three-carbon chain with a positive charge at the central carbon atom is compared to a similar structure with the positive charge at the terminal carbon. 4. **Carbon Chain with Methyl Group** - A three-carbon chain with a methyl group in a staggered conformation is compared against one in an eclipsed formation. 5. **Carbon Chain with Positive Charge** - A two-carbon chain with a positive charge is compared against a similar structure with a methoxy group (OCH3) attached to the carbon. 6. **Oxygen and Sulfur Stability** - A ketone (C=O) with negative charge on the oxygen is compared to a chain with negative charge on a sulfur atom. 7. **Alcohol vs. Ketone** - A chain with an alcohol group (OH) is compared to one with a ketone group (C=O). 8. **Anion Stability: Oxygen vs. Sulfur** - A four-carbon chain with a negatively charged oxygen is compared to a similar structure with a negatively charged sulfur. 9. **Alkene Chains** - Two structures, each with a four-carbon chain, one with a double bond at different positions. Evaluate which structure in each pair is likely to be more stable based on factors such as electron distribution, steric hindrance, and molecular conformation.
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