The pseudosymmetric structure of bis(diisopropylammonium) hexachloroiridate(IV) and its relationship to potassium hexachloroiridate(III)

Abstract

Bis­(diiso­propyl­ammonium) hexa­chloro­iridate(IV), [{(H3C)2CH}2NH2]2[IrCl6], crystallizes in the monoclinic centrosymmetric space group P21/c with two crystallographically independent [IrCl6]2− anions, each located on a center of symmetry, and two crystallographically independent diiso­propyl­ammonium cations in general positions. Weak hydrogen bonding occurs between the cations and anions to form layers parallel to the bc plane. Each layer is built by annealed 24-membered rings that can be classified according to Etter's nomenclature as R88(24). The structural relationship between K3[IrCl6] and the title compound shows that a replacement of three potassium cations by two diiso­propyl­ammonium cations leads to a layered structure. The hydro­philic layers that are dominated by hexa­chloro­iridate(IV) anions are separated by lipophilic regions in the planes at x = 1/4 and x = 3/4.