Abstract
Excess molar volumes and viscosities η for ethylene glycol dimethyl ether (monoglyme), CH3OC2H4OCH3, diethylene glycol dimethyl ether (diglyme), CH3(OC2H4)2OCH3, triethylene glycol dimethyl ether (triglyme), CH3(OC2H4)3OCH3, tetraethylene glycol dimethyl ether (tetraglyme), and CH3(OC2H4)4OCH3 + acetonitrile (CH3CN) have been measured as a function of composition at 298.15 K and atmospheric pressure. The measurements of excess volume have been carried out with a continuous dilution dilatometer. The excess volumes are all negative over the entire range of composition and decrease with increasing number of oxygen atoms in the glyme molecule. The results are discussed in terms of dipole−dipole interactions between glymes and acetonitrile and their magnitudes increasing with the dipole character of the glyme molecules.
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