Synthesis and crystal structures of inorganic–organic hybrids incorporating an aromatic amine with a chiral functional group

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Abstract
In this paper we report the synthesis and the crystal structure of inorganic–organic hybrids containing various lead halides as the inorganic motif and a primary amine as the organic constituent. The organic molecule investigated is (C6H5C*H(CH3)NH2) and both the R and S as well as the racemic (±) 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 PbCl3((R)–C6H5CH(CH3)NH3), PbBr3((R)–C6H5CH(CH3)NH3), PbI3((R)–C6H5CH(CH3)NH3) and PbI3((S)–C6H5CH(CH3)NH3); 1-D polymeric corner-sharing chains of formula PbCl5((±)–C6H5CH(CH3)NH3)3 and PbBr5((±)–C6H5CH(CH3)NH3)3; and 2-D corner-sharing layers of formula PbI4((S)–C6H5CH(CH3)NH3)2 and PbI4((R)–C6H5CH(CH3)NH3)2. The changes in geometry and intermolecular interactions such as hydrogen bonding and pi stacking are discussed and compared between the eight structures.

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