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

S. Ferrandin, A. M. Z. Slawin, W. T. A. Harrison

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Abstract

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: Structure Reports Online
VolumeE75
DOIs
Publication statusPublished - 31 Jul 2019
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry(all)

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