title: Synthesis, structural characterization and dielectric properties of (C6H9N2)2(Hg0.75Cd0.25)Cl4 compound.
abstract: The present paper undertakes the study of a title compound whose structure is (C6H9N2)2(Hg0.75Cd0.25)Cl4. The centrosymmetric compound crystallizes in the triclinic space group P-1, with a=7.580(7) Å; b=8.572(8) Å; c=15.433(13) Å; α=84.49(5)°; β=89.13(5)°; γ=68.53(5)° and Z=2. The crystal structure was solved and refined to R (int)=0.0212 using 7932 independent reflections. The atomic arrangement shows an alternation of organic and inorganic layers. Between layers, the cohesion is performed via N-H⋯Cl hydrogen bonding, yet in the organic sheets, cations are further connected to classical π-π stacking. The Infrared and Raman spectra of this compound reported from 400 to 4000 cm(-1) confirmed the presence of the principal bands assigned to the internal modes of organic cation. Solid-state (13)C and (111)Cd CP-MAS-NMR spectra are reported. The dielectric study of this compound has been measured, in order to determine the σ(d.c) conductivity which is thermally activated with activation energy about 1.5 eV.
authors: University of Sfax, Condensed Matter Laboratory, Faculty of Sciences, B.P. 1171, 3000 Sfax, Tunisia. Electronic address: elwejrim@yahoo.fr.
authors: R
authors: R
authors: Elwej
authors: University of Sfax, Condensed Matter Laboratory, Faculty of Sciences, B.P. 1171, 3000 Sfax, Tunisia.
authors: M
authors: M
authors: Hamdi
authors: University of Sfax, Condensed Matter Laboratory, Faculty of Sciences, B.P. 1171, 3000 Sfax, Tunisia.
authors: N
authors: N
authors: Hannachi
authors: University of Sfax, Condensed Matter Laboratory, Faculty of Sciences, B.P. 1171, 3000 Sfax, Tunisia.
authors: F
authors: F
authors: Hlel
mesh_terms: D000838:Anions / Q000032:analysis; D002152:Calorimetry, Differential Scanning; D002412:Cations / Q000032:analysis; D004553:Electric Conductivity; D004560:Electricity; D006860:Hydrogen Bonding; D009682:Magnetic Resonance Spectroscopy; D008968:Molecular Conformation; D010847:Picolines / Q000138:chemical synthesis* / Q000737:chemistry*; D017550:Spectroscopy, Fourier Transform Infrared; D013059:Spectrum Analysis, Raman; D013696:Temperature; D013818:Thermogravimetry; D014961:X-Ray Diffraction
chemical_list: D000838:Anions; D002412:Cations; D010847:Picolines; C015672:2-amino-4-picoline
keywords: (C(6)H(9)N(2))(2)(Hg(0.75)Cd(0.25))Cl(4); Dielectric constant; IR and Raman spectra; NMR spectroscopy; X-ray diffraction