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

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Summary

Introduction

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

II.1. Crystal chemistry
II.2. Crystal structure
II.4. Electrical measurements
Result and discussions
III.2. Infrared spectroscopy
III.3. Calorimetric study
III.4. Electrical study
Conclusion
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