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Alkylammonium Hexachlorometallates, IV . Synthesis and Crystal Structure of Bis(1,4‐diammoniobutane) Diaquahydrogen Hexachlororhodate(III) Dichloride, [H 3 N–(CH 2 ) 4 – NH 3 ] 2 [H 5 O 2 ][RhCl 6 ]Cl 2
Author(s) -
Frank Walter,
Reiß Guido J.
Publication year - 1996
Publication title -
chemische berichte
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 0009-2940
DOI - 10.1002/cber.19961291107
Subject(s) - chemistry , chloride , crystal structure , hydrogen bond , hydrochloric acid , crystallography , hydrogen chloride , crystallization , ion , rhodium , medicinal chemistry , inorganic chemistry , molecule , catalysis , organic chemistry
Bis(1,4‐diammoniobutane) diaquahydrogen hexachlorohodate(III) dichloride, [H 3 N–(CH 2 ) 4 –NH 3 ] 2 [H 5 O 2 ][RhCl 6 ]Cl 2 ( 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 H 5 O 2 + ion has a crystallographically imposed C i symmetry and shows the typical 1:1 disorder of the central hydrogen atom for a symmetrically strong [OO 2.406(10) Å] doubleminimum potential O–H–O bond.