Cystamindi-ium tetrachlorocuprate [NH₃(CH₂)₂SS(CH₂)₂NH₃][CuCl₄]: synthesis, crystal structure, and thermal decomposition

Abstract

The salt [NH 3 (CH 2 ) 2 SS(CH 2 ) 2 NH 3 ] [CuCl 4 ] was obtained by crystallization after adding CuCl 2 to cystamine (Cysta), solved in hydrochloric acid. The assumption of conserved disulfide connection (S-S) in the compound, made on the basis of infrared spectroscopy, is further supported by the crystal structure determined from X-ray powder diffraction data. The compound has an ionic structure. [CuCl 4 ] 2− and CystaH 2 2+ ions package in the form of inorganic and organic layers in the cell, interconnected through the formation of hydrogen bonds via NH 3 -groups and chlorine atoms of the complex [CuCl 4 ] 2− . Inorganic layers are additionally stabilized in the parquet package of [CuCl 4 ] 2− ions which provides a Cu-distorted octahedral coordination. CystaH 2 [CuCl 4 ] is stable in air up to 200°C. Thermal decomposition occurs in several stages, accompanied by breaking of S-S bonds, releasing of the organic component and yielding CuO.

Organic–Inorganic Hybrid Tin Halide Single Crystals with Sulfhydryl and Hydroxyl Groups: Formation, Optical Properties, and Stability

“…Fourier transform infrared (FTIR) spectroscopy was conducted to identify the species in Figure S4. The N–H, S–S, C–S, C–N, and HPO 3 2– vibration peaks originated from the sample, which agreed well with previous reports. , The occurrence of the sample was further verified by their powder XRD and 1 H, 13 C, and 31 P NMR. as given in Figures S5–S8.…”

Inversion of Molecular Chirality Associated with Ferroelectric Switching in a High-Temperature Two-Dimensional Perovskite Ferroelectric

“…Single-crystal X-ray diffraction (SC-XRD) analyses performed at room temperature (RT) revealed 1 crystallized in a polar monoclinic space group P2 1 (2 point group) with cell parameters of a = 7.1829(5) Å, b = 7.5102(5) Å, c = 12.0187(10) Å, β = 101.159(7)°, and V = 636.09(8) Å 3 (Table S1), as determined by powder X-ray diffraction analyses in a previous study. 45 The crystal structure can be described as an organic−inorganic 2D halide perovskite structure in which the inorganic layers are composed of cornersharing CuCl 6 octahedrons and the interlayer space is occupied by the CystaH 2 2+ organic cations (Figure 1). 46−48 Similar to other Cu II Cl perovskites, 49,50 S1).…”