The 1H2H, 17O1H coupling constants and the 16O/18O induced proton isotope shift in water
1997
Abstract At very low concentration in nitromethane the coupling constants J (H,D) and J( 17 O,H ) of the water molecule at 353 K are found to be 1.091(±0.005) and 80.6(±0.1) Hz, respectively. The high accuracy was achieved by lineshape analysis using the QUADR program for the proton resonance and temperature variation for the 17 O-resonance. Measurements of the proton isotope shift due to 16 O/ 18 O substitution reveal to noticeable shift in contradiction to an early reported detection by others.
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