Re: ORGLIST: Query

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From: Jacob Zabicky (zabicky$##$bgumail.bgu.ac.il)
Date: Tue Mar 30 1999 - 04:53:42 EST


>Hi there
>I have been trying to find kinetic diameters, Van der Waal's radius
>and/or other size parameters of molecules like ethanol, methanol, DMF,
>etc. have looked all over but can't find any. Is there any place that I
>would find these things?? Any help will be appreciated. Thanks.
>Hormuzd R. Mulla
>

Hello Hormuzd,

I would look in various sources:

1. In the Landolt-Boerenstein collection, in the volumes referring to
molecular properties.

2. In advanced books on Physical Chemistry chapters related to
intermolecular energy, even if they are a few dacades old. For example, in
that of Moelwyn-Hughes (1957) you find quite a nice treatment of Mie's
equation and the Lennard-Jones' equation.

3. In books on thermodynamic properties of fluids you may find listed the
"acentric factor" and the Lennard-Jones parameters for many compounds. The
acentric factor is related to the symmetry of the molecules and affects
vapor-liquid equilibria. Chemical engineers use these books for estimation
of system properties that serve as basis for process design. A good one of
that class is R. C. Reid, J. M. Prausnitz and B. E. Poling, "The properties
of Gases and Liquids," McGraw-Hill.

Hope this is useful,

Jacob

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Prof. Jacob Zabicky Tel. 972-7-6461271/6461062/6472754
Institutes for Applied Research Fax. 972-7-6472969
Ben-Gurion University of the Negev Private: POB 12366, Beer-Sheva 84863
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