Densities and Excess Volumes of Methyl 1,1-Dimethylpropyl Ether + Benzene, or Cyclohexane, or an Alkane (C₆−C₁₆) at 298.15 K

Abstract

Densities and excess volumes of {methyl 1,1-dimethylpropyl ether (TAME) + (benzene or cyclohexane or hexane or octane or decane or dodecane or tetradecane or hexadecane)} at 298.15 K are presented. The observed influence of the n-alkane length can be predicted qualitatively by the Flory equation of state.

Phase Equilibria and Volumetric Properties in Binary Mixtures Containing Branched Chain Ethers (Methyl 1,1-Dimethylethyl Ether or Ethyl 1,1-Dimethylethyl Ether or Methyl 1,1-Dimethylpropyl Ether or Ethyl 1,1-Dimethylpropyl Ether)

“…For higher n-alkanes this tendency is reversed and excess volumes decrease with increasing n-alkane size. A similar phenomenon was reported for (n-alkane + dipropyl ether) by Wang et al (1989) and for (n-alkane + TAME) by Witek et al (1997). The order of the increase in V m E depends of the possible shape of the n-alkane chain in the solution.…”

“…Recent papers from our laboratory have reported measurements of excess molar volumes V m E of MTAE with n-alkanes (C 6 -C 16 ) or benzene or cyclohexane at 298.15 K (Witek et al, 1997) and of excess volumes of hydrocarbons with MTBE or ETBE or MTAE at 298.15 K and 308.15 K (Doman ´ska, 1997) and of excess molar enthalpies of hydrocarbons with MTBE or MTAE at 298.15 K and 308.15 K (Letcher and Doman ´ska, 1997). The excess molar volumes V m E of ETAE with n-alkanes (C 6 -C 16 ) or benzene or cyclohexane or 1-heptyne at 298.15 K and 308.15 K (Doman ´ska and Łachwa, 1999) and the excess molar enthalpies H m E of hydrocarbons with ETAE at 298.15 K (Letcher and Doman ´ska, 1999) have also been reported.…”

Excess molar volumes of (hydrocarbon + ethyl 1,1-dimethylpropyl ether) atT= (298.15 and 308.15) K

“…V E m increases with increasing n-alkane length from hexane to octane {the V E m (max) values for heptane, octane and decane are very similar} and decreases with increasing n-alkane size. This has also been reported earlier (8) for (n-alkane + dipropyl ether) and for (n-alkane + MTAE, (7) or ETBE (4) ). The molar excess enthalpies increase with increasing n-alkane carbon chain as shown by us earlier.…”

Excess molar enthalpies of (hexane, or octane, or decane, or dodecane, or hexadecane, or cyclohexane, or 1-heptene, or 1-heptyne, or 2,2,4-trimethylpentane + ethyl 1,1-dimethylpropyl ether) at the temperature 298.15 K

“…Ethyl 1,1-dimethylpropyl ether (ETAE) was synthesized at the Organic Chemistry Division, Department of Chemistry, Warsaw University of Technology (mole fraction purity = 0.999; boiling point T b = 373.40 K; molar volume V m (298.15 K) = 152.74 cm 3 · mol −1 ). Each solvent was fractionally distilled under atmospheric pressure after prolonged reflux over different drying reagents.…”