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Which of the following compounds is not chiral ?
[AIEEE-2004]
- a)1 - chloropentane
- b)2 - chloropentane
- c)1 - chloro - 2 - methyl pentane
- d)3 - chloro - 2 - methyl pentane
Correct answer is option 'A'. Can you explain this answer?
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Verified Answer
Which of the following compounds is not chiral ? [AIEEE-2004] a)1 - ch...
1-chloropentane is a correct answer.
Because the absence of asymmetric carbon atom .
Halogen atom present on 10 carbon atom.
- wherein
CH_{3}-CH_{2}-CH_{2}-Cl
1-Chloropentane
Cl-CH_{2}-CH_{2}-CH_{2}-CH_{2}-CH_{3}
There is no chiral carbon in this compound. It is not chiral.
Most Upvoted Answer
Which of the following compounds is not chiral ? [AIEEE-2004] a)1 - ch...
1-chloro-pentane
CH3−CH2−CH2−CH2−CH2Cl
As it does not contain chiral centre so it is optically inactive (not chiral)compound.
CH3−CH2−CH2−CH2−CH2Cl
As it does not contain chiral centre so it is optically inactive (not chiral)compound.
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Which of the following compounds is not chiral ? [AIEEE-2004] a)1 - ch...
Understanding Chirality
Chirality is a property of a molecule that occurs when it cannot be superimposed on its mirror image. A chiral molecule typically has one or more chiral centers, usually carbon atoms with four different substituents.
Analyzing the Compounds
Let’s examine each of the given compounds to determine their chirality.
Conclusion
Among the compounds listed, 1 - chloropentane is the only one that is not chiral due to the absence of a chiral center. The other three compounds have at least one chiral center, making them chiral in nature.
Chirality is a property of a molecule that occurs when it cannot be superimposed on its mirror image. A chiral molecule typically has one or more chiral centers, usually carbon atoms with four different substituents.
Analyzing the Compounds
Let’s examine each of the given compounds to determine their chirality.
- 1 - Chloropentane:
- Structure: CH3-CH2-CH2-CH2-Cl
- This molecule has no chiral centers.
- It has two identical sides (the two CH2 groups), making it achiral. - 2 - Chloropentane:
- Structure: CH3-CH(Cl)-CH2-CH2-CH3
- This molecule has a chiral center at the second carbon (C2).
- The presence of four distinct groups (Cl, CH3, CH2CH2, and H) makes it chiral. - 1 - Chloro - 2 - methyl pentane:
- Structure: CH3-CH(Cl)-CH(CH3)-CH2-CH3
- The second carbon (C2) is a chiral center with four different groups attached.
- Thus, this compound is chiral. - 3 - Chloro - 2 - methyl pentane:
- Structure: CH3-CH(CH3)-CH(Cl)-CH2-CH3
- The third carbon (C3) is a chiral center with distinct groups.
- This compound is also chiral.
Conclusion
Among the compounds listed, 1 - chloropentane is the only one that is not chiral due to the absence of a chiral center. The other three compounds have at least one chiral center, making them chiral in nature.
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Which of the following compounds is not chiral ? [AIEEE-2004] a)1 - chloropentaneb)2 - chloropentanec)1 - chloro - 2 - methyl pentaned)3 - chloro - 2 - methyl pentaneCorrect answer is option 'A'. Can you explain this answer?
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