Journal of Solution Chemistry

, Volume 31, Issue 5, pp 369–380 | Cite as

Refractive Indexes of Binary Mixtures of Tetrahydrofuran with 1-Alkanols at 25°C and Temperature Dependence of n and ρ for the Pure Liquids

  • Ángel Piñeiro
  • Pilar Brocos
  • Alfredo Amigo
  • Mercedes Pintos
  • Ramón Bravo

Abstract

Refractive indexes at 25°C were measured for binary mixtures of tetrahydrofuran with 1-hexanol, 1-heptanol, 1-octanol, 1-nonanol, and 1-decanol. Densities, from which excess molar volumes were derived, were measured at the same temperature for the system tetrahydrofuran + 1-decanol. Refractive indexes and densities for the pure compounds were determined at 11 temperatures between 20 and 30°C. The thermal expansion coefficients and the temperature derivatives of the refractive index for these liquids were calculated at 25°C. The temperature dependence of the molar refraction was also examined. The contribution to the molar refraction of a CH2 group was calculated as was the difference between contributions from CH3 and CH2OH groups. The change of molar refraction on mixing is d iscussed in terms of molecular interactions and alkyl chain length.

Refractive index density molar refraction tetrahydrofuran 1-alkanols 

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Copyright information

© Plenum Publishing Corporation 2002

Authors and Affiliations

  • Ángel Piñeiro
    • 1
  • Pilar Brocos
    • 1
  • Alfredo Amigo
    • 1
  • Mercedes Pintos
    • 1
  • Ramón Bravo
    • 1
  1. 1.Departamento de Física Aplicada, Facultad de FísicaUniversidad de Santiago de CompostelaSantiago de CompostelaSpain

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