In the First molecule there will be Resonance which will distribute the -ve charge between the two O atoms making it the least Basic. (Increase in concentrated -ve charge increases basicity) The first molecule i.e CH3CH2O-Li+. is the most basic due to the +I (Inductive) Effect of the CH3CH2- group. This group would push e- towards the O atom increasing its charge by delta-. Solution In the First molecule there will be Resonance which will distribute the -ve charge between the two O atoms making it the least Basic. (Increase in concentrated -ve charge increases basicity) The first molecule i.e CH3CH2O-Li+. is the most basic due to the +I (Inductive) Effect of the CH3CH2- group. This group would push e- towards the O atom increasing its charge by delta-..