2. ) Are the pairs of structures shown below constitutional isomers, enantiomers, diastereomers, or the same? а) b) NH2 CI and and Br Br NH2 c) ОН ОН d) and and CI

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Chapter1: Chemical Foundations
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**Educational Content: Isomer Identification**

**Objective:** Determine whether the given pairs of chemical structures are constitutional isomers, enantiomers, diastereomers, or the same compound.

**Structure Pairs Analysis:**

a) **Pair of Bicyclic Halides**
   - First Structure: Bicyclic compound with chlorine (Cl) and bromine (Br) substituents.
   - Second Structure: Bicyclic compound with bromine (Br) and chlorine (Cl) substituents in swapped positions.

b) **Cyclohexene Derivatives**
   - First Structure: Cyclohexene with an amino group (NH₂) as a substituent.
   - Second Structure: Cyclohexene with a different stereochemistry for the amino group (NH₂).

c) **Chlorohydrin Isomers**
   - First Structure: Cyclohexane with chlorine (Cl) and hydroxyl (OH) groups attached.
   - Second Structure: Cyclohexane with chlorine (Cl) and hydroxyl (OH) groups attached, differing in stereochemistry.

d) **Epoxide Isomers**
   - First Structure: Simple epoxide with one stereochemical orientation.
   - Second Structure: Epoxide with the opposite stereochemical orientation.

e) **Butadiene Isomers**
   - First Structure: Linear butadiene isomer.
   - Second Structure: Different connectivity leading to a distinct butene isomer.

f) **Non-conjugated vs. Conjugated System**
   - First Structure: Linear alkene with three carbon-carbon double bonds.
   - Second Structure: Cyclic structure with one carbon-carbon double bond, distinct from the linear form.

g) **Bicyclic Alkanes**
   - First Structure: Bicyclic alkane with methyl groups.
   - Second Structure: Bicyclic alkane with different methyl group positions.

h) **Chlorobromomethane Stereoisomers**
   - First Structure: Molecule with chlorine (Cl) and bromine (Br) in a specific stereochemical orientation.
   - Second Structure: Same molecular formula with reverse stereochemistry for Cl and Br.

**Conclusion:**
Each pair of chemical structures represents a distinct stereochemistry or connectivity scenario that must be carefully analyzed to determine their classification as constitutional isomers, enantiomers, diastereomers, or identical compounds. This exercise enhances understanding of molecular stereochemistry and structural variety.
Transcribed Image Text:**Educational Content: Isomer Identification** **Objective:** Determine whether the given pairs of chemical structures are constitutional isomers, enantiomers, diastereomers, or the same compound. **Structure Pairs Analysis:** a) **Pair of Bicyclic Halides** - First Structure: Bicyclic compound with chlorine (Cl) and bromine (Br) substituents. - Second Structure: Bicyclic compound with bromine (Br) and chlorine (Cl) substituents in swapped positions. b) **Cyclohexene Derivatives** - First Structure: Cyclohexene with an amino group (NH₂) as a substituent. - Second Structure: Cyclohexene with a different stereochemistry for the amino group (NH₂). c) **Chlorohydrin Isomers** - First Structure: Cyclohexane with chlorine (Cl) and hydroxyl (OH) groups attached. - Second Structure: Cyclohexane with chlorine (Cl) and hydroxyl (OH) groups attached, differing in stereochemistry. d) **Epoxide Isomers** - First Structure: Simple epoxide with one stereochemical orientation. - Second Structure: Epoxide with the opposite stereochemical orientation. e) **Butadiene Isomers** - First Structure: Linear butadiene isomer. - Second Structure: Different connectivity leading to a distinct butene isomer. f) **Non-conjugated vs. Conjugated System** - First Structure: Linear alkene with three carbon-carbon double bonds. - Second Structure: Cyclic structure with one carbon-carbon double bond, distinct from the linear form. g) **Bicyclic Alkanes** - First Structure: Bicyclic alkane with methyl groups. - Second Structure: Bicyclic alkane with different methyl group positions. h) **Chlorobromomethane Stereoisomers** - First Structure: Molecule with chlorine (Cl) and bromine (Br) in a specific stereochemical orientation. - Second Structure: Same molecular formula with reverse stereochemistry for Cl and Br. **Conclusion:** Each pair of chemical structures represents a distinct stereochemistry or connectivity scenario that must be carefully analyzed to determine their classification as constitutional isomers, enantiomers, diastereomers, or identical compounds. This exercise enhances understanding of molecular stereochemistry and structural variety.
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