Why is the C-Cl bond length in haloarenes (169 pm) shorter than in haloalkanes (177 pm), contributin

Q: What is the correct answer for CBSE12?

The correct answer is B. In haloarenes, the carbon atom bonded to the halogen is sp² hybridized, while in haloalkanes, it is sp³ hybridized. An sp² hybridized carbon has greater s-character (33% s-character) compared to an sp³ hybridized carbon (25% s-character). Greater s-character means the electrons are held more tightly to the nucleus, resulting in a shorter and stronger C-Cl bond. This stronger bond makes it more dif

Q: Why is the C-Cl bond length in haloarenes (169 pm) shorter than in haloalkanes (177 pm), contributing to their lower reactivity in nucleophilic substitution?

The correct answer is B. In haloarenes, the carbon atom bonded to the halogen is sp² hybridized, while in haloalkanes, it is sp³ hybridized. An sp² hybridized carbon has greater s-character (33% s-character) compared to an sp³ hybridized carbon (25% s-character). Greater s-character means the electrons are held more tightly to the nucleus, resulting in a shorter and stronger C-Cl bond. This stronger bond makes it more dif

Q: What are the options for this CBSE12 question?

A. The sp³ hybridization of carbon in haloarenes. · B. The sp² hybridization of carbon in haloarenes, which has more s-character. · C. The larger size of the chlorine atom in haloarenes. · D. The presence of a strong inductive effect only in haloarenes.

Question

Why is the C-Cl bond length in haloarenes (169 pm) shorter than in haloalkanes (177 pm), contributing to their lower reactivity in nucleophilic substitution?

FirstInTest · Accepted Answer

In haloarenes, the carbon atom bonded to the halogen is sp² hybridized, while in haloalkanes, it is sp³ hybridized. An sp² hybridized carbon has greater s-character (33% s-character) compared to an sp³ hybridized carbon (25% s-character). Greater s-character means the electrons are held more tightly to the nucleus, resulting in a shorter and stronger C-Cl bond. This stronger bond makes it more difficult to break, thus reducing reactivity towards nucleophilic substitution.

Answer

The sp³ hybridization of carbon in haloarenes.

Answer

The sp² hybridization of carbon in haloarenes, which has more s-character.

Answer

The larger size of the chlorine atom in haloarenes.

Answer

The presence of a strong inductive effect only in haloarenes.

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