ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Prediction of excess molar volumes of binary mixtures of organic compounds from refractive indices

Ivona R. Radović, Mirjana Lj. Kijevčanin, Marijan Z. Gabrijel, Slobodan P. Šerbanović, and Bojan D. Djordjević

Department of Chemical Engineering, Faculty of Technology and Metallurgy, University of Belgrade, Karnegijeva 4, 11120 Belgrade, Serbia

E-mail: mirjana@tmf.bg.ac.yu

Received: 30 March 2007  Revised: 31 August 2007  Accepted: 10 October 2007

Abstract: The excess molar volumes of 51 binary mixtures containing diverse groups of organic compounds: alcohols (methanol, ethanol, propan-1-ol, butan-1-ol, pentan-1-ol, hexan-1-ol, and heptan-1-ol), (cyclo-) alkanes (hexane, heptane, octane, nonane, decane, undecane, dodecane, and cyclohexane), esters (diethyl carbonate and ethyl chloroacetate), aromatics (o-xylene, m-xylene, p-xylene, and ethylbenzene), ketones (acetone), and ethers (anisole), were predicted from the refractive index data, using three types of equations coupled with several different mixing rules for refractive index calculations: the Lorentz-Lorenz, Dale-Gladstone, Eykman, Arago-Biot, Newton, and the Oster. These systems were chosen since they belong to different classes of organic species forming molecular interactions and intermolecular forces during mixing resulting in positive or negative, smaller or larger deviations from ideal behaviour. The obtained results were analysed in terms of the applied equation and mixing rule, the nature of compounds of the mixtures and the influence of alkyl chain length of the alkane or alcohol molecule.

Keywords: excess molar volume - refractive index - prediction - binary systems

Full paper is available at www.springerlink.com.

DOI: 10.2478/s11696-008-0027-x

Chemical Papers 62 (3) 302–312 (2008)