Crystal Structure of DL-Serinium Heptafluorodiantimonate(III)

Abstract

The crystal structure of DL-serinium heptafluorodiantimonate(III) (C₃H₈NO₃)Sb₂F₇ (I) synthesized for the first time is determined (monoclinic crystal system: a = 6.6367(1) Å, b = 5.9521(1) Å, c = 13.5562(3) Å, Z = 2, space group P2₁). The structure of (C₃H₈NO₃)Sb₂F₇ represents a new structure type of complex antimony(III) fluoride with a protonated amino acid cation. It is formed of DL-serinium (C₃H₈NO₃)⁺ cations and dimeric [Sb₂F₇]^- anion complexes. The complex [Sb₂F₇]^- anions consist of two trigonal SbF₄E bipyramids sharing a vertex. The structural units are arranged into a three-dimensional framework via N–H⋯F, O–H⋯O, and O–H⋯F hydrogen bonds.