Isolated versus Condensed Anion Structure II; the Influence of the Cations (1,3-propanediammonium, 1,4-phenylendiammonium, and n-propylammonium) on Structures and Phase Transitions of CdBr^2- ₄Salts A ^79,81Br NQR and X-ray Structure Analysis

Abstract

The influence of the cations on the condensation of anions CdBr

On the Structural Phase Transition in a Perovskite-Type Diaminopropanetetrachlorocuprate(II) NH3(CH2)3NH3CuCl4 Crystal

“…Among them an interesting group of hybrid compounds are perovskite-type layered compounds containing propylenediammonium cations (NH 3 (CH 2 ) 3 NH 3 ) and layered metal-halogen anionic sublattices. Up to now, structural phase transitions were found in the case of crystals containing propylenediammonium cations in [NH 3 (CH 2 ) 3 NH 3 ]CdCl 4 -phase transition at 375 K [1][2][3] and [NH 3 (CH 2 ) 3 NH 3 ]CdBr 4 -phase transitions at 326 K and 385 K [4,5]. Two structural phase transitions were found at 305 K and 337 K in [NH 3 (CH 2 ) 3 NH 3 ]MnCl 4 [6].…”

Synthesis, spectral, thermal, crystal structure, Hirschfeld analysis of [bis(triamine)Cadimium(II)][Cadimum(IV)tetra-bromide] complexes and their thermolysis to CdO nanoparticles

“…The shape of cadmium(II) halide complex anions depending on the number of hydrogen bonds and the cations species [2–5]. There are variable shapes of the complex anions such as tetrahedral [10, 11], two-dimensional layered structures [12], and complex chain structures [13–15]. Cadmium complexes have attracted considerable interest due to pharmacological importance including anti-microbial agents [4], DNA binding affinity [3], and anticancer activities [5–7, 16, 17].…”

Crystal Structures of Piperazinium Tetrahalogenometallates (II) [C4H12N2]MX4 (M = Zn, Hg; X = Br, I)

“…We have been studying crystal and molecular structures of cadmium(II) halide [1 -13] and zinc(II) halide complexes [7,12,14,15] and their phase transitions for the last decade by X-ray structure analysis and nuclear quadrupole resonance (NQR). A variety of polymeric structures of anions in the Cd compounds were detected, whereas only isolated tetrahedral ZnX 4 2− anions exist in the Zn compounds.…”