Resumo

LEMMERER, Andreas  e  BILLING, David G.. Inorganic-Organic Hybrids Incorporating a Chiral Cyclic Ammonium Cation. S.Afr.j.chem. (Online) [online]. 2013, vol.66, pp.263-272. ISSN 1996-840X.

In this paper we report the synthesis and the crystal structure of eight inorganic-organic hybrids containing various lead halides as the inorganic motif and a chiral, primary ammonium cation as the organic constituent. The organic cation investigated is (C₆H₁₁C*H(CH₃)NH₃)+ and both the (R) and (S) as well as the racemic (RS) forms were used. Within the structures obtained, three different inorganic motifs are displayed by the lead halide octahedra: 1-D polymeric face-sharing chains of formula ((R)-[C₆H₅CH(CH₃)NH₃)PbBr₃](4) and [((S)-C₆H₅CH(CH₃)NH₃)PbBr₃](5); 1-D polymeric corner-sharing ribbons based on the terminated-K₂NiF₄ type structure of formula ((R)-[C₆H₅CH(CH₃)NH₃)₈Pb₈I₁₄](1) and [((S)-C₆H₅CH(CH₃)NH₃)₈Pb₈I₁₄] (2); and 2-D corner-sharing layers based on the K₂NiF₄ perovskite structure type of formula [((RS)-C₆H₅CH(CH₃)NH₃)₂PbBr₄] (3), [((RS)C₅H₅CH(CH₃)NH₃)₂PbCl₄] (6), (R)-[C₆H₅CH(CH₃)NH₃)₂PbCl₄] (7) and [((S)-C₆H₅CH(CH₃)NH₃)₂PbCl₄] (8).

Palavras-chave : Inorganic-organic hybrids; X-ray crystal structure; hydrogen bonding; lead halide octahedra.

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