Deuteron quadrupole resonance studies. Part 9.—1H/2H, 23Na double resonance in some anhydrous and hydrated hydroxides

Abstract

² H double-resonance signals have been detected at room temperature in a number of partially-deuterated hydroxides of alkali metals and alkaline earths and some of their monohydrates. The ²H quadrupole coupling constants of the OH^– ion are correlated with the stretching force constants. ²H signals from the water molecules have been observed at 293 K only in LiOH·H₂O; they show a marked structure due to a combination of dipolar coupling together with the “isotope effect” arising from hydrogen bonding to the OH^– ion. ²³Na quadrupole resonance was also detected in both NaOH and NaOH·H₂O by an interesting variation of the normal double-resonance level-crossing technique.