E1 unimolecular elimination (Rate = k[RX]; carbocation then loss of β-proton to form alkene)

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Rate = k[RX]; carbocation then loss of β-proton to form alkene

What each symbol means

SymbolWhat it stands for
kRate constant
RXAlkyl halide / leaving group substrate

When to use this

Polar protic solvent; formation of stable carbocation; β-hydrogen required. Competes with SN1 (same first step).