Hydrogen–deuterium isotope effects in the proton n.m.r. spectra of hydrated alIII species

Abstract

Proton n.m.r. spectra have been obtained for a number of hydrolysed Al^III perchlorate salt solutions dissolved in deuterioacetone, with which they exchange deuterium and become partially deuteriated: bound H₂O and OH entities can be distinguished since the former appear as HOD/H₂O doublets, through the isotope shift is negative, in contrast to the normal positive effect seen with free water; the resonances also contain a fine isotope shift structure which appears to permit the number of protons around a given Al to be counted and so potentially to provide structural information about the polymeric species present.