Abstract
Infrared and 13C and 31P multinuclear magnetic resonance spectroscopy (NMR) studies of trimethyl phosphate in eight different binary solvent systems were undertaken to investigate the solute-solvent interactions and to correlate the infrared band shift, the 13C and 31P NMR chemical shifts. A linear relationship between binary solvent composition in aprotic solvents and the infrared and 13C NMR shift was observed, whereas for the 31P shift this was not always the case. From the IR, the 13C NMR and from the 31P NMR data in binary mixtures containing protic solvents it can be seen that, in the concentration range between 0.00 and ca. 0.3 mole fraction alcohol, solute-solvent hydrogen bonding effects dominate, whereas above this concentration changes in the solvation shell are observed. The results demonstrate that in some binary solvent systems the infrared, 13C and 31P shift can be predicted if one of them is known.
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