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Among the following four structures I to...

Among the following four structures I to IV
I `{:(" "CH_(3)),(" "|),(C_(2)H_(5)-CH-C_(3)H_(7)):}`
II `{:(" "O" "CH_(3)),(" || |"),(CH_(3)-C-CH-C_(2)H_(5)):}`
III `H-undersetHunderset|oversetHoverset|(C^(oplus))`
IV `overset(CH_(3))overset(|)underset(C_(2)H_(5)-CH-C_(2)H_(5)` it is true that

A

all four are chiral compounds

B

only I and II are chiral compounds

C

only III is a chiral compound

D

only II and IV are chiral compounds

Text Solution

AI Generated Solution

The correct Answer is:
To determine which of the given structures (I to IV) are chiral compounds, we need to identify if they contain any asymmetric carbon centers. A chiral compound must have at least one carbon atom bonded to four different groups. ### Step-by-Step Solution: 1. **Analyze Structure I:** - The structure is represented as \( C_2H_5-CH-CH_3-C_3H_7 \). - Identify the carbon atom that may be chiral. The central carbon (attached to \( C_2H_5 \), \( CH_3 \), \( C_3H_7 \), and \( H \)) has four different groups attached to it. - **Conclusion:** Structure I is a chiral compound. 2. **Analyze Structure II:** - The structure is represented as \( CH_3-C(=O)-CH-CH_2C_2H_5 \). - Identify the chiral carbon. The carbon connected to \( CH_3 \), \( C_2H_5 \), \( C=O \), and \( H \) has four different groups. - **Conclusion:** Structure II is also a chiral compound. 3. **Analyze Structure III:** - The structure shows a carbon atom with four hydrogen atoms attached (\( H_4C \)). - Since all four substituents are the same (hydrogens), this carbon does not have four different groups attached. - **Conclusion:** Structure III is not a chiral compound. 4. **Analyze Structure IV:** - The structure is represented as \( C_2H_5-CH-CH_2C_2H_5 \). - The central carbon is attached to two \( C_2H_5 \) groups, making it impossible for it to be chiral as it does not have four different groups. - **Conclusion:** Structure IV is not a chiral compound. ### Final Conclusion: - Structures I and II are chiral compounds. - Structures III and IV are not chiral compounds. ### Answer: The correct option is **B: Only I and II are chiral compounds.** ---
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