Acta Cryst. (2002). E58, o1309-o1311  [ doi:10.1107/S1600536802019347 ]

Diisopropylammonium chloride hemihydrate, a combined single-crystal and powder diffraction study

G. J. Reiß and B. Koppelhuber-Bitschnau

Abstract: By the reaction of diisopropylamine (dip) with hydrochloric acid and crystallization at room temperature, dipHCl, known from the literature, and the corresponding hemihydrate, C₆H₁₆N⁺·Cl^-·0.5H₂O or dipHCl·0.5H₂O, have been obtained. By using a new humidity chamber for the powder diffraction study it has been proven that dipHCl reacts via a solid-solid phase transition to give dipHCl·0.5H₂O on increasing the relative humidity of the sample atmosphere. The cations and anions are connected by hydrogen bonds to form chains along the crystallographic [100] direction. The extended polymeric zigzag chains form layers in the ac plane, separated by water molecules. The cations and water molecules lie on crystallographic twofold rotation axes.

Online 31 October 2002

Copyright © International Union of Crystallography
IUCr Webmaster