A hemiaminal's a functional group or type of chemical compound that's a hydroxyl group and an amine attached to the same carbon atom: -C(OH)(NR2)-. R can be hydrogen or an alkyl group. Hemiaminals are intermediates in imine formation from an amine and a carbonyl by alkylimino-de-oxo-bisubstitution. An example's of an hemiaminal's that obtained from reaction of secondary amine carbazole and formaldehyde Those generated from primary amines are unstable to the extent that they've never been isola… (More on Hemiaminal)