Structure cristalline et analyses thermique et de surface Hirshfeld du diperchlorate de 4-aza-niumyl-2,2,6,6-tetramethylpiperidin-1-ium.

ABSTRACT: The synthesis of 4-aza-niumyl-2,2,6,6-tetra-methyl-piperidin-1-ium diperchlorate, C₉H₂₂N₂²⁺·2ClO₄^-, was carried out from an aqueous reaction of perchloric acid with 4-amino-2,2,6,6-tetra-methyl-piperidine. This compound was characterized by TGA-DSC analysis and single-crystal X-ray diffraction. The piperidine ring of the dication adopts a chair conformation and the orientation of the C-NH₃ bond is equatorial. One of the two crystallographically independent perchlorate anions exhibits disorder [occupancies 0.625?(7) and 0.375?(7)]. The crystal packing is constituted by a succession of mixed layers parallel to the (-102) plane, made up of C₉H₂₂N₂²⁺ dications and ClO₄^- anions. These ions are linked by normal and bifurcated N-H?O hydrogen bonds with R₄⁴(12) graph-set motifs, generating a two-dimensional network. The inter-molecular inter-actions in the crystal structure were qu-anti-fied and analysed using Hirshfeld surface analysis.

SUBMITTER: Chebbi H 

PROVIDER: S-EPMC5730294 | biostudies-literature | 2017 Oct

REPOSITORIES: biostudies-literature