4A.C Determine if the following compound is chiral or not. Indicate if there is a "meso" compound (use "none" if there is not any). (a) (b) Me Me vie (d) Он (e) (f) НО Ме Ме Ме Ме Me HỌ, ОН Me

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# Chiral Compounds Assessment

**4A. [Redacted] Determine if the following compound is chiral or not. Indicate if there is a “meso” compound (use “none” if there is not any).**

### Compounds to Evaluate:

#### (a) Structure:
- Contains a cyclohexane ring with two methyl groups (Me) and two keto groups (O). 
- Each methyl group is positioned diametrically opposite each other.
- The oxygen atoms are double-bonded to the carbon atoms adjacent to the methyl groups.

#### (b) Structure:
- Cyclohexane ring with axial hydrogen atoms.
- Two methyl groups are attached in a 1,2-cis configuration to the cyclohexane ring.
- One methyl group is at the carbon neighboring a carbonyl group.

#### (c) Structure:
- A cyclohexane derivative with hydrogen atoms alternating in orientation.
- One methyl group and two different substituents present.

#### (d) Structure:
- A six-membered carbon chain featuring hydroxyl groups (OH) positioned on the first and third carbons.
- Includes a methyl group on the second carbon.

#### (e) Structure:
- Features a cyclohexanone ring with one keto group (O).
- Two methyl groups attached at adjacent positions with stereochemical descriptors indicated by dashed and solid bonds.

#### (f) Structure:
- Contains a biphenyl core linked by a chiral carbon with one hydroxyl (OH) and one methyl group (Me).

### Explanation:
- **Chirality** refers to the existence of two non-superimposable mirror images of a molecule. 
- **Meso compound** is a molecule with multiple chiral centers that is superimposable on its mirror image due to an internal plane of symmetry.

Based on the provided structures, determine the chirality and presence of meso compounds as required.
Transcribed Image Text:# Chiral Compounds Assessment **4A. [Redacted] Determine if the following compound is chiral or not. Indicate if there is a “meso” compound (use “none” if there is not any).** ### Compounds to Evaluate: #### (a) Structure: - Contains a cyclohexane ring with two methyl groups (Me) and two keto groups (O). - Each methyl group is positioned diametrically opposite each other. - The oxygen atoms are double-bonded to the carbon atoms adjacent to the methyl groups. #### (b) Structure: - Cyclohexane ring with axial hydrogen atoms. - Two methyl groups are attached in a 1,2-cis configuration to the cyclohexane ring. - One methyl group is at the carbon neighboring a carbonyl group. #### (c) Structure: - A cyclohexane derivative with hydrogen atoms alternating in orientation. - One methyl group and two different substituents present. #### (d) Structure: - A six-membered carbon chain featuring hydroxyl groups (OH) positioned on the first and third carbons. - Includes a methyl group on the second carbon. #### (e) Structure: - Features a cyclohexanone ring with one keto group (O). - Two methyl groups attached at adjacent positions with stereochemical descriptors indicated by dashed and solid bonds. #### (f) Structure: - Contains a biphenyl core linked by a chiral carbon with one hydroxyl (OH) and one methyl group (Me). ### Explanation: - **Chirality** refers to the existence of two non-superimposable mirror images of a molecule. - **Meso compound** is a molecule with multiple chiral centers that is superimposable on its mirror image due to an internal plane of symmetry. Based on the provided structures, determine the chirality and presence of meso compounds as required.
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