Journal
JOURNAL OF CHEMICAL INFORMATION AND COMPUTER SCIENCES
Volume 40, Issue 6, Pages 1337-1348Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ci0003247
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Several quantitative structure-property relationship (QSPR) models between 15 basic physical properties or thermodynamic functions of alkanes and their molecular electronegative distance;vectors (MEDV) are developed. For six of the properties-boiling point (BP), density (D) at 25 degreesC, refraction index (RI) at 25 degreesC, critical temperature (CT), critical pressure (CP), and surface tension (ST)at 20 degreesC-logarithmic models are found to give better results than conventional (linear) models since the values of these properties all tend to a,limit with increasing carbon chain length. All models are created using multiple linear regression (MLR). Conventional models are proposed for the remaining nine physical properties or thermodynamic functions: molar volume (MV) at 20 degreesC, molar refraction (MR) at 20 degreesC, heat capacity (HC) at 300 K,; enthalpy (E) at 300-K, heats of vaporization (HV) at 25 degreesC, heat of atomization (HA) at 25 OC, standard heat of formation (HF) at 25 degreesC, heat of formation in liquid (HFL) at 25 degreesC, and heat of formation in gas (HFG) at 25 degreesC.
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