Substitution and Elimination reactions

SN2 reacts fastest with what alkyl halide

CH3>1>2

kinetics for SN2

r=k[E+][Nu-]

stereochemistry for SN2

inversion

Nucleophile for SN2

strong nucleophile

solvent for SN2

polar aprotic solvent

temperature for SN2

room temp

SN1 reacts fastest with what alkyl halide

3>2

kinetics for SN1

r=k[E+]

stereochemistry for SN1

racemization

nucleophile for SN1

weak

solvent for SN1

polar protic

temperature for SN1

room temp

E2 reacts fastest with what alkyl halide

3>2>1

kinetics for E2

r=k[RX][B]

stereochemistry for E2

antiperiplanar for acyclic molecules, transdiaxial for cyclic structures

base for E2

strong base

solvent for E2

polar aprotic

temperature for E2

>50C

E1 reacts fastest with what alkyl halide

3>2

kinetics for E1

r=k[RX]

stereochemistry for E1

none

base for E1

weak

solvent for E1

polar protic

temperature for E1

>50C