W. Frank, G. Reiss
Nov 1, 1996
Citations
0
Influential Citations
10
Citations
Journal
Chemische Berichte
Abstract
Bis(1,4-diammoniobutane) diaquahydrogen hexachlorohodate(III) dichloride, [H3N–(CH2)4 –NH3]2[H5O2][RhCl6]Cl2 (1), was synthesized by the reaction of rhodium(III) chloride with 1,4-diaminobutane dihydrochloride in concentrated hydrochloric acid. The red compound slowly decomposes at room temperature, but is stable for months and up to 106°C (DTA) under hydrogen chloride. Crystals of 1 were obtained by diffusion-controlled crystallization (space group P,1¯). The solid-state structure can be considered as a sequence of layers linked by hydrophobic interactions between the aliphatic chains of the 1,4-diammoniobutane ions. Within these layers the hydrophilic building blocks (hexachlororhodate and chloride anions, the diaquahydrogen cations and the ammonio groups of the diammoniobutane cations) are connected by a complex system of OHCl and NHCl hydrogen bonds. The H5O2+ ion has a crystallographically imposed Ci symmetry and shows the typical 1:1 disorder of the central hydrogen atom for a symmetrically strong [OO 2.406(10) A] doubleminimum potential O–H–O bond.