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(A) Tertiary carbocations are generally ...

(A) Tertiary carbocations are generally formed more easily than primary carbocations.
(R) Hyperconjugation as well as inductive effect due to additional alkyl groups stabilize tertiary cabocations.

A

if both assertion and reason are true and reason is thr correct explanation of assertion

B

If both assertion and reason are true but reason is not the correct explanation of assertion

C

If assertion is true but reason is false

D

If both assertion and reson are false.

Text Solution

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To solve the assertion and reason question, we need to analyze both statements carefully. ### Step 1: Understanding the Assertion The assertion states that "Tertiary carbocations are generally formed more easily than primary carbocations." **Analysis**: - Tertiary carbocations (3°) have three alkyl groups attached to the positively charged carbon atom, while primary carbocations (1°) have only one alkyl group attached. - The presence of more alkyl groups in tertiary carbocations leads to greater stability due to hyperconjugation and inductive effects. **Conclusion**: The assertion is true. ### Step 2: Understanding the Reason The reason states that "Hyperconjugation as well as inductive effect due to additional alkyl groups stabilize tertiary carbocations." **Analysis**: - Hyperconjugation refers to the delocalization of electrons from adjacent C-H or C-C bonds to the positively charged carbon atom, which helps to stabilize the carbocation. - The inductive effect refers to the electron-donating ability of alkyl groups, which helps to reduce the positive charge on the carbocation, further stabilizing it. **Conclusion**: The reason is also true and correctly explains why tertiary carbocations are more stable than primary carbocations. ### Final Conclusion Both the assertion and reason are true, and the reason correctly explains the assertion. Therefore, the answer to the question is that both statements are true, and the reason is a correct explanation of the assertion.
To solve the assertion and reason question, we need to analyze both statements carefully. ### Step 1: Understanding the Assertion The assertion states that "Tertiary carbocations are generally formed more easily than primary carbocations." **Analysis**: - Tertiary carbocations (3°) have three alkyl groups attached to the positively charged carbon atom, while primary carbocations (1°) have only one alkyl group attached. - The presence of more alkyl groups in tertiary carbocations leads to greater stability due to hyperconjugation and inductive effects. ...
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Reaction intermdiates are short lived species and are highly reactive. They are formed by heterolytic and homolytic bond fission. There are various types of reaction intermediates in which the most important are carbocation , carbanion and free radical. Carbocation is an organic species in which carbon have positive charge and six electrons in its outermost shell. The stability of carbocation can be increased by positive inductive effect, hyperconjugation and delocalisation. If alpha -atom with respect to carbocation has one or more lone pair of electron then lone pair of electron strongly stabilises the carbocation due to octet completion. Species in which carbon have negative charge is called carbanion. Carbanion carries three bond pairs and one lone pair. The stability of carbanion can be increased by negative inductive effect, negative mesomeric effect and delocalisation. Free radical is a species which have seven electrons in its outermost shell. The stability of free radical can be increased by hyperconjugation and delocalisation. The stability order of following free radicals is: C_(6)H_(5)underset(I)CH_(2)overset(*)CH_(2)" "CH_(3)underset(II)CH_(2)overset(*)CH_(2)" "underset(" "III)(C_(6)H_(5))overset(*)CH_(2)" "underset(IV)(CH_(3)^(*)