Intramolecular hydrogen bonding in protonated α-halogeno-aldehydes: nuclear magnetic resonance study
Abstract
The n.m.r. spectra of protonated α-chloroacetaldehyde and α-chlorobutyraldehyde in strong acid solution show the presence of two isomeric species, one of which can be explained in terms of intramolecular hydrogen bonding between the proton on oxygen and the chlorine atom.