Internal Pressure in Binary Aqueous Solutions
of Monoethanolamine, Diamines, and Diols

V. N. Kartsev*, M. N. Rodnikova**, S. N. Shtykov*, and J. Bartel***

* Saratov State University, Universitetskaya ul. 42, Saratov, 410601 Russia

** Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences,
Leninskii pr. 31, Moscow, 117907 Russia

*** Institute of Theoretical and Physical Chemistry of Regensburg University, Regensburg, Germany

Received February 28, 2002

Abstract—Information on internal pressure and its temperature dependence was used to characterize transfor-
mations of the H-bond network in binary aqueous solutions of monoethanolamine, diols, and diamines. It was
demonstrated that the bend in the concentration dependence of the internal pressure temperature coefficient is
a manifestation of significant structural rearrangements in the associated solutions under study. The interval
between zero and the lower concentration boundary of the bend is a concentration range within which the H-
bond network of water remains virtually undisturbed, whereas the upper boundary of the bend corresponds to
the most stable water–nonelectrolyte associate.

Pleiades Publishing home page | journal home page | top

If you have any problems with this server, contact webmaster.