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Analysis of the 1 H‐ 17 O dipolar contribution to the proton longitudinal relaxation rate in 17 O‐enriched water yields a correlation time for re‐orientation of the O–H vector τ rOH = (1.71 ± 0.07) ps in H 2 O at 25 °C. This result is insensitive to uncertainties in the calculated intermolecular relaxation contribution. From 1 H, D, and 17 O relaxation rates in H 2 O/D 2 O mixtures deuterium isotope effects on the correlation times were estimated. The quadrupole coupling constants of D and 17 O in liquid water were determined.
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Lankhorst et al. (1982) studied this question.
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