An 17O nuclear quadrupole double resonance study of several crystal hydrates

Abstract

Using the technique of double resonance with coupled multiplets (DRCM), 17O double resonance signals were detected in natural abundance from the H 2O molecule in the hydrates BeSO 4 · 4H 2O, AlCl 3 · 6H 2O, CH 3COOLi · 2H 2O, LiClO 4 · 3H 2O, Sr(OH) 2 · H 2O, Ba(OH) 2 · 8H 2O, LiBr · 2H 2O and MgSO 4 · 7H 2O. Using the DRCM technique approximate values for the HOH bond angle and the OH bond length were determined from the dipolar structure present on the 17O double resonance signals. A Townes and Dailey analysis was used to examine the small differences in the 17O quadrupole coupling constants and asymmetry parameters between these samples.