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What is Hammond Postulate
The Hammond Postulate states that the transition state of a reaction resembles either the reactants or products, depending on whether the reaction is exothermic or endothermic, helping to predict the structure and stability of carbocations.
In an exothermic reaction TS resembles LHS or RHS
RHS
In an endothermic reaction TS resembles LHS or RHS
LHS
+I inductive effects _____ carbocations
stabilise
-I inductive effects _____ carbocations
destabilise
vinyl carbocation has ________ because +ve charge is perpendicular to the sp2 orbitals
no resonance
3 ways form carbocation
Lewis acid, Acid activation of OHs, Addition to pi system (H+)
Carbocation reactions
Addition of Nucleophile, Elimination and Migration(rearrangement)