  Structures resembling semiclathrates probably arise in liquid aqueous
solutions of piperidine at the amine mole fraction below 0.03. With the
increasing concentration, the structures gradually decay, but the 1:1 complexes
of piperidine with water remain linked one to another through the O-H...O bonds
between the hydration water molecules. A periodic order of the bicontinuous
microemulsion type occurs in the range of the mole fractions from 0.08 to 0.5.
In the piperidine-rich mixtures, the 1:1 complexes are dispersed uniformly in
the amine. Relatively low stabilization energy of these complexes probably
causes that piperidine is totally miscible with water.
