Strong/Weak Bases/Nucleophiles

NaH

strong base, weak nucleophile

DBN

strong base, weak nucleophile

DBU

strong base, weak nucleophile

OH-

strong base, strong nucleophile

MeO-

strong base, strong nucleophile

EtO-

strong base, strong nucleophile

I-

weak base, strong nucleophile

Br-

weak base, strong nucleophile

Cl-

weak base, strong nucleophile

R-S-

weak base, strong nucleophile

HS-

weak base, strong nucleophile

SH2

weak base, strong nucleophile

H2O

weak base, weak nucleophile

MeOH

weak base, weak nucleophile

EtOH

weak base, weak nucleophile

primary - strong base, weak nucleophile

E2

secondary - strong base, weak nucleophile

E2

tertiary - strong base, weak nucleophile

E2

primary - strong base, strong nucleophile

Sn2, E2 (Sn2 is major)

secondary - strong base, strong nucleophile

Sn2, E2 (E2 is major)

tertiary - strong base, strong nucleophile

E2

primary - weak base, strong nucleophile

Sn2

secondary - weak base, strong nucleophile

Sn2

tertiary - weak base, strong nucleophile

Sn1

primary, secondary - weak base, weak nucleophile

NO reaction

tertiary - weak base, weak nucleophile

Sn1, E1 (cannot control which is major/minor)