Crystal structure and electrical properties study of 4-aminopyridinium chloridobismuthate (III) (C5N2H7)4.HBi2Cl11

Abstract

The crystal structure of (C 5 N 2 H 7 ) 4 .HBi 2 Cl 11 has been determined at room temperature by single crystal X-ray diffraction. The compound crystallizes in the triclinic system with Pī space group. The crystal structure consists of two asymmetric inequivalent molecules of 4-aminopyridinium and anionic HBi 2 Cl 11 chains. The HBi 2 Cl 11 anionic chains stacked along the a-axis are formed with Bi 2 Cl 11 dimers connected to each other via hydrogen atoms. The crystal packing is stabilized with N-H...Cl hydrogen bonds connecting aminopyridinium units to the HBi 2 Cl 11 anionic chains. The title compound exhibits an order-disorder phase transition at 338 K. The AC electrical conductivity properties of (C 5 N 2 H 7 ) 4 . HBi 2 Cl 11 compound have been investigated by means of impedance spectroscopy measurements over wide ranges of frequencies and temperatures, 200 Hz to 5 MHz and 303 to 418 K, respectively. Detailed analysis of the impedance spectrum suggests that the electrical properties of the material are strongly temperature dependent. The frequency-dependent conductivity data were fitted in the Jonscher's law: s w ð Þ ¼ sð0Þ þ Aw n . The nature of variation of DC conductivity suggests Arrhenius type of electrical conductivity.

A novel one-dimensional tubular cadmium(II) coordination polymer based on 5-(carboxylatomethoxy)benzene-1,3-dicarboxylate containing 4-aminopyridinium ions

“…There are nointeractions in the structure of (I) in contrast to the closely packed complex [Cd(HOABDC)] n (Wang, Li, Yang & Zhao, 2012). Pyridine can be easily protonated with an inorganic acid (hydrochloric acid) or even an organic acid (5-hydroxyisophthalic acid) (Khelifi et al, 2010;Wheatley et al, 1999). As electron-donating groups, -NH 2 or -OH could improve the base strength of the pyridine ring.…”

Crystal structure, Hirshfeld surface analysis, Thermal study and Conduction mechanism of [(C4H9)4P]3Bi2Cl9 compound

“…It's clear from this graph that the radius of the arcs decreases with the increase of temperature. So, the process of electrical conduction in the studied hybrid compound is thermally activated ).…”

“…So, the process of electrical conduction in the studied hybrid compound is thermally activated. [35] In order to study the electric properties, the impedance components are fitted using Zview software and the best fit is obtained when employing an equivalent circuit model which formed by a parallel combination the bulk resistance R and the fractal interface capacity CPE (insert Figure 9). The impedance of CPE capacity is given by the following equation [36] :…”

Halobismuth(III) salts with substituted aminopyridinium cations

“…One of these involves [Bi n I 4n ] nÀ anionic chains, but the structure has the space group Pbcn and is thus not isostructural with that of (6) (Buikin et al, 2018). Khelifi et al (2010) reported an unusual structure involving [H n Bi 2n Cl 11n ] nÀ anionic chains with hydrido bridges between Cl atoms within the repeat unit. Kulicka et al (2006) described polymorphs of salts involving 4-aminopyridinium and cis-double-chlorido-bridged [Bi n Cl 4n ] nÀ anionic zigzag chains at 100 and 250 K; the low-temperature form appears to be isostructural with that of (6).…”