Question

wheather CH4 can act as lewis acid or lewis base? plz explain.

Answer 1

hope so its helpful but I don't know much more about it

Answer 2

$CH_4$ acts as a Lewis base because it has the tendency to donate an electron pair.

Explanation:

If we consider the example of Friedal Crafts analysis, then we will observe that aluminum chloride is electron deficient and accepts a lone pair from the chlorine on the acid chloride molecule. To compensate for the loss of electron density the bond holding chlorine to the carbonyl group becomes polarized and ready to break.

This leaves the carbonyl group with the partial and complete positive charge, enabling it to act as an electrophile.