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Temperature dependent NMR chemical shifts for hydrogen and oxygen, NMR quadrupole coupling constants for deuterium and vibrational frequencies for the OH bond of liquid ethanol are calculated for the temperature range 250 to 350 K using the ab initio quantum cluster equilibrium method and compared with experimental measurements. The calculated NMR chemical shifts, quadrupole coupling constants and infrared vibrational frequencies are in good agreement with experimental measurements. The results indicate that cyclic tetramer and pentamer structures rather than linear structures are the principal components of liquid ethanol.
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Ludwig et al. (1999) studied this question.
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