or
or
The molecule CH3CHO is incapable of showing cannizaro reaction because all its carbon atoms are not attached to a common system. Although CH3CHO is a bipartite molecule with a carbonyl group (CHO) and a methyl group (CH3), its carbon atoms are not connected to each other in a cyclic or common system. Therefore, there is no possibility of cannizaro reaction in this molecule, although it can behave like an aldehyde.
