Syntheses and crystal structures of a new family of hybrid perovskites: C5H14N2•ΑBr3•0.5H2O (it A = K, Rb, Cs)

Sarah Ferrandin, Alexandra M. Z. Slawin, William T. A. Harrison (Corresponding Author)

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2 Citations (Scopus)
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The syntheses and crystal structures of three hybrid perovskites, viz. poly[1-methyl­piperizine-1,4-diium [tri-μ-bromido-potassium] hemihydrate], {(C5H14N2)[KBr3]·0.5H2O}n, (I), poly[1-methyl­piperizine-1,4-diium [tri-μ-bromido-rubidium] hemihydrate], {(C5H14N2)[RbBr3]·0.5H2O}n, (II), and poly[1-methyl­piperizine-1,4-diium [tri-μ-bromido-caesium] hemihydrate], {(C5H14N2)[CsBr3]·0.5H2O}n, (III), are described. These isostructural (space group Amm2) phases contain a three-dimensional, corner-sharing network of distorted ABr6 octa­hedra (A = K, Rb, Cs) with the same topology as the classical perovskite structure. The doubly protonated C5H14N22+ cations occupy inter­stices bounded by eight octa­hedra and the water mol­ecules lie in square sites bounded by four octa­hedra. N—H⋯Br, N—H⋯(Br,Br), N—H⋯O and O—H⋯Br hydrogen bonds consolidate the structures.
Original languageEnglish
Pages (from-to)1243-1248
Number of pages6
JournalActa Crystallographica Section E: Crystallographic Communications
Issue number8
Early online date26 Jul 2019
Publication statusPublished - 1 Aug 2019


  • crystal structure
  • hybrid perovskite
  • hydrogen bonding


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