Arrange the following in increasing base strength
CH3OHI ⊖CH3CO2I ⊖CH3OII ⊖CH3OIII ⊖OHIV
< <
Always remember,
→ Nucleophiles act as Lewis' bases.
Nucleophilicity versus basicity
⇒ If the nucleophilic atoms are from the same period of the periodic table, strength as anucleophile parallels
strength as a base, For example:
H2O < NH3
Increasing base strength
Increasing nucleophile strength