Structure, Atomic Hirshfeld Surface, Spectroscopic Studies, and Magnetic and Dielectric Properties of New Mixed Solid Solution (NH4)2Mn0.17Cu0.83Cl4·2H2O
January 2019
in “
Applied Organometallic Chemistry
”
TLDR The compound (NH4)2Mn0.17Cu0.83Cl4.2H₂O has a specific structure, shows weak magnetism at low temperatures, and undergoes phase changes at high temperatures.
In 2018, a study was conducted on a newly synthesized compound, (NH4)2Mn0.17Cu0.83Cl4.2H₂O, to investigate its structure and physical properties. The compound was found to belong to the tetragonal system with P4(2)/mnm space group, with its structure consisting of discrete [Cu/MnCl4-2H₂O]²¯ octahedra. The highest contribution to the intermolecular contacts in the crystal structure was due to H...Cl/Cl...H interaction (71.9%). The compound exhibited weak ferromagnetic behavior at low temperature (Tc = 12 K), confirmed by hysteresis loops. Thermal analysis showed three exothermic peaks, indicating phase transitions and the loss of water molecules. The dielectric properties showed a dielectric anomaly around T₁ = 425 K and a large increase in permittivity around T₂ = 447 K. The study concluded that the compound exhibits a second-order phase transition and has a ferromagnetic behavior at low temperature.
