Abstract
The title compound 1-(2-ammonium-ethyl) piperaziniumpentachlorothallate (III) dihydrate crystallizes in the monoclinic system with space group Cm. The unit cell dimensions are: a = 12.786(5), b = 12.021(5), c = 10.566(5) Å, β = 93.469(5) °, with Z = 4. Its crystal structure was determined and refined down to R = 0.045. The structure of this compound consists of 1-(2-ammonium-éthyl) pipéraziniumcations and [Tl2Cl10]4- dimers. The arylammoniumcations are located between anions and connected to the halogen atoms by N-H…Cl hydrogen bonds. One phase transition at T = 320 K is detected and studied by differential scanning calorimetry, dielectric and impedance spectroscopy measurements. The evolution of the dielectric constant and dissipation factor as a function of temperature revealed the transition characterized by a strong jump in the conductivity plot.
Highlights
A large number of inorganic thallium (III) complexes are presently known anda systematic survey of their main crystallographic data has been reported [1, 2]
The research of organic–inorganic polar crystals is very important for quadratic nonlinear optical phenomena which are, today, oriented to the organic aromatic cations containing π-electrons systems asymmetrized by electron donor and/or accepted substitutes
The 1(2-ammonium-ethyl) piperaziniumpentachlorothallate (III) dihydrate belongs to the monoclinic system with Cm space group
Summary
A large number of inorganic thallium (III) complexes are presently known anda systematic survey of their main crystallographic data has been reported [1, 2]. The second is devoted to the ionic hostmatrices that may increase the packing cohesion built up through ionic, hydrogen bonding often by underlying of a more important resistance in organic-inorganic polar crystals than in purely organic polar materials. Taking these considerations into account, we report and discuss the results of investigations, concerning a new compound [C6H17N3]TlCl5. This structural study is accompanied by calorimetric, dielectric and impedance spectroscopy measurements
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