Question

Arrange the following: In decreasing order of basic strength in gas phase: C₂H₅NH₂, (C₂H₅)₂NH, (C₂H₅)₃N and NH₃

Answer 1

When there is a gas phase, then there will be no solvation effect present.

Hence, +I effect is the one on which the whole basic strength will work on.

The base will be strong with the higher +I effect.

Also, the alkyl group will be greater with +I effect.

Hence the decreasing order will be:

(C2H5)3N > (C2H5)2NH > C2H5NH2 > NH3