Which of the following pairs of compounds are constitutional isomers? A) B) OH C) D) O B and D O B only O A and B O A

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**Title: Identifying Constitutional Isomers**

**Question:**
Which of the following pairs of compounds are constitutional isomers?

**Options:**

**A)**
- Compound 1: O-ethyl (O bonded to an ethyl group)
- Compound 2: An ether with the structure: CH3-CH2-O-CH3

**B)**
- Compound 1: Cyclopentane (a five-membered carbon ring)
- Compound 2: 1-pentyne (a linear five-carbon chain with a triple bond between the first and second carbon atoms)

**C)**
- Compound 1: 2-propanol (isopropyl alcohol, a three-carbon chain with a hydroxyl group on the second carbon)
- Compound 2: Propane (a three-carbon alkane)

**D)**
- Compound 1: An ether with the structure: CH3-CH2-O-CH2-CH3 (diethyl ether)
- Compound 2: Butanol (a four-carbon chain with a hydroxyl group on the first carbon)

**Answer options:**
- O B and D
- O B only
- O A and B
- O A

**Explanation of Diagrams:**
- **Pair A**: The first diagram shows an oxygen atom bonded to an ethyl group, forming an ether. The second diagram shows a similar ether with CH3-CH2-O-CH3.
- **Pair B**: The first diagram depicts a cyclopentane, a ring of five carbon atoms. The second diagram shows 1-pentyne, a linear chain of five carbon atoms with a triple bond between the first and second carbons.
- **Pair C**: The first diagram is 2-propanol, an isopropyl alcohol with three carbons and a hydroxyl group on the second carbon. The second diagram shows propane, a simple three-carbon alkane.
- **Pair D**: The first diagram shows diethyl ether, an ether with the formula CH3-CH2-O-CH2-CH3. The second diagram represents butanol, a four-carbon alcohol with a hydroxyl group on the first carbon.

*Note:* Constitutional isomers (structural isomers) are compounds with the same molecular formula but different connectivity of their atoms. Examine each pair and determine if their connectivity differs, confirming they are constitutional isomers.
Transcribed Image Text:**Title: Identifying Constitutional Isomers** **Question:** Which of the following pairs of compounds are constitutional isomers? **Options:** **A)** - Compound 1: O-ethyl (O bonded to an ethyl group) - Compound 2: An ether with the structure: CH3-CH2-O-CH3 **B)** - Compound 1: Cyclopentane (a five-membered carbon ring) - Compound 2: 1-pentyne (a linear five-carbon chain with a triple bond between the first and second carbon atoms) **C)** - Compound 1: 2-propanol (isopropyl alcohol, a three-carbon chain with a hydroxyl group on the second carbon) - Compound 2: Propane (a three-carbon alkane) **D)** - Compound 1: An ether with the structure: CH3-CH2-O-CH2-CH3 (diethyl ether) - Compound 2: Butanol (a four-carbon chain with a hydroxyl group on the first carbon) **Answer options:** - O B and D - O B only - O A and B - O A **Explanation of Diagrams:** - **Pair A**: The first diagram shows an oxygen atom bonded to an ethyl group, forming an ether. The second diagram shows a similar ether with CH3-CH2-O-CH3. - **Pair B**: The first diagram depicts a cyclopentane, a ring of five carbon atoms. The second diagram shows 1-pentyne, a linear chain of five carbon atoms with a triple bond between the first and second carbons. - **Pair C**: The first diagram is 2-propanol, an isopropyl alcohol with three carbons and a hydroxyl group on the second carbon. The second diagram shows propane, a simple three-carbon alkane. - **Pair D**: The first diagram shows diethyl ether, an ether with the formula CH3-CH2-O-CH2-CH3. The second diagram represents butanol, a four-carbon alcohol with a hydroxyl group on the first carbon. *Note:* Constitutional isomers (structural isomers) are compounds with the same molecular formula but different connectivity of their atoms. Examine each pair and determine if their connectivity differs, confirming they are constitutional isomers.
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