1H NMR studies of aqueous solutions of some n-alkoxyethanols (C1Em, m=1,2,3) or polyethers (C1EmC1, m=1,2,3,4) at 298.15 K

H-1 NMR spectra in binary mixtures of water and ethylene glycol monomethyl ether (2-methoxyethanol, C3H7O2; C1E1), diethylene glycol monomethyl ether (2-(2-methoxyethoxy)ethanol, C5H12O3; C1E2), triethylene glycol monomethyl ether [2-{2-(2-methoxyethoxy)ethoxy}ethanol, C7H16O4; C1E3), ethylene glycol dimethyl ether (1,2-dimethoxyethane, C4H10O2; C1E1C1), diethylene glycol dimethyl ether (bis(2-methoxyethyl)ether, C6H14O3; C1E2C1), triethylene glycol dimethyl ether (1,2-bis(2-methoxyethoxy)ethane, C8H18O4; C1E3C1), and tetraethylene glycol dimethyl ether (2,5,8,11,14-pentaoxapentadecane, C10H22O5; C1E4C1) are recorded over the whole composition range at 298.15 K under atmospheric pressure. The experimental data have been used to calculate the deviations in chemical shift from the additive properties, viz. Delta delta as a function of mole fractions, and values obtained are fitted to the Redlich-Kister polynomial equation to obtain the binary coefficients and the standard errors. An attempt has also been made to correlate the values of the spectral parameter Delta delta calculated from H-1 NMR data with various physicochemical properties. (c) 2004 Elsevier B.V All rights reserved.