Bis(diisopropylammonium) Hexafluorosilicate(IV)

Abstract

In bis(diisopropylammonium) hexafluorosilicate(IV), [{(CH3) 2 CH} 2 NH 2 ] 2 [SiF 6 ]. two symmetry-related diisopropylammonium cations in general positions are connected via two N-H...F hydrogen bonds to one hexafluorosilicate(IV) anion lying on a twofold axis to form a quasi-molecular 2:1 ion pair. These units are further connected by significantly weaker N-H...F bonds to form infinite chains along [001]. The [SiF 6 ] 2- ion is distorted from the highest possible O h symmetry to C 4ν associated with the hydrogen-donating environment. The diisopropylammonium cation possesses approximately C 2 symmetry.