8 public questions tagged with this topic.
2-Methylpropan-2-ol ((CH₃)3COH), a tertiary alcohol, forms a stable tertiary carbocation ((CH₃)3C+) during dehydration via an E₁ mechanism.
Ref: NCERT Class 12 Chemistry > Chapter 7: Alcohols, Phenols and Ethers > Topic: Chemical Reactions of Alcohols - Dehydration Oxidation Esterification
SN₁ reactivity increases with carbocation stability. (CH₃)3CCl (tertiary) forms a stable tertiary carbocation, making it most reactive.
Ref: NCERT Class 12 Chemistry > Chapter 6: Haloalkanes and Haloarenes > Topic: Nucleophilic Substitution Reactions - SN1 and SN2 Mechanisms
Cleavage at C-Cl forms CH₃CH₂CH⁺CH₃ (secondary). Hyperconjugation with adjacent C-H bonds stabilizes it.
Ref: NCERT Class 11 Chemistry > Chapter 8: Organic Chemistry - Some Basic Principles and Techniques > Topic: Fundamental Concepts - Reaction Mechanism - Fission and Reaction Intermediates
Stability decreases with less substitution: primary < secondary < tertiary. CH₃CH₂⁺ (primary) is the least stable.
Ref: NCERT Class 11 Chemistry > Chapter 8: Organic Chemistry - Some Basic Principles and Techniques > Topic: Fundamental Concepts - Reaction Mechanism - Fission and Reaction Intermediates
(CH₃)₂CH⁺ (secondary) is more stable than primary carbocations due to hyperconjugation with adjacent C-H bonds.
Ref: NCERT Class 11 Chemistry > Chapter 8: Organic Chemistry - Some Basic Principles and Techniques > Topic: Electronic Effects - Inductive Mesomeric Hyperconjugation and Resonance
Cleavage at C-Cl forms CH₃CH₂CH₂CH⁺CH₃ (secondary). A hydride shift to CH₃CH₂CH⁺CH₂CH₃ (secondary) is equally stable, but +I effect from alkyl groups favors it slightly more.
Ref: NCERT Class 11 Chemistry > Chapter 8: Organic Chemistry - Some Basic Principles and Techniques > Topic: Electronic Effects - Inductive Mesomeric Hyperconjugation and Resonance
Heterolytic cleavage of CH₃CH₂CH(CH₃)CH₂Cl at CH₂Cl forms CH₃CH₂CH(CH₃)CH₂⁺ (primary), but a hydride shift forms CH₃CH₂C⁺(CH₃)CH₃ (tertiary), stabilized by the +I effect of three alkyl groups.
Ref: NCERT Class 11 Chemistry > Chapter 8: Organic Chemistry - Some Basic Principles and Techniques > Topic: Electronic Effects - Inductive Mesomeric Hyperconjugation and Resonance
Tertiary carbocations are more stable due to hyperconjugation and inductive effects. (CH₃)₃C⁺ (tertiary) is more stable than primary or secondary ones.
Ref: NCERT Class 11 Chemistry > Chapter 8: Organic Chemistry - Some Basic Principles and Techniques > Topic: Electronic Effects - Inductive Mesomeric Hyperconjugation and Resonance
