Thermal properties of [Co(en)2Cl2]Cl in solid state. Cis–trans isomerization of the [Co(en)2Cl2]+ complex ion in methanol

Abstract

]Cl complex isomers have been studied using the TG-FTIR and TG-DSC-MS techniques. The measurements were carried out in argon atmosphere over the temperature range 293-873 K. The influence of the configurational geometry on the pathways of thermal transformations was discussed. Furthermore, kinetic studies on the reaction of the cis-trans isomerization of the [Co(en) 2 Cl 2 ]Cl complex salt in methanolic solutions were performed using UV-Vis spectrophotometry at five temperatures in the 293-313 K temperature range. The observed rate constants were computed using the ''Glint'' program based on the global analysis. It has been found that the cis-trans isomerization of [Co(en) 2 Cl 2 ]Cl is a first order reaction. Furthermore, the cis/trans [Co(en) 2 Cl 2 ]Cl isomerization proceeds according to the dissociative mechanism.

Amplified vibrational circular dichroism as a manifestation of the interaction between a water soluble gold nanocluster and cobalt salt

“…Note that Co 3+ , when complexed with ethylenediamine, absorbs around 550 nm and sometimes the absorption is even more red shifted. 38 The observation that the spectra of Co 2+ are basically identical with and without captopril indicates that Co 2+ does not form strong complexes with captopril, in agreement with the IR and VCD spectra of captopril-CoCl 2 solutions. In solutions containing the cluster the absorption due to Co 2+ is masked by the strong absorption of the cluster in this spectral range.…”

Structure, Physicochemical and Biological Properties of an Aqua (2,2′,2′′‐Nitrilotriacetato)‐oxidovanadium(IV) Salt with 4‐Methylpyridinium Cation

“…The nitrogen atom of nta or 4‐Me(Py) constitutes another factor that can participate in the inter‐ and/or intramolecular redox processes. Reducing properties of nitrogen‐containing ligands were also observed during thermal transformations of other coordination compounds , …”

Characterization and cytotoxic effect of aqua-(2,2′,2′′-nitrilotriacetato)-oxo-vanadium salts on human osteosarcoma cells

“…The nitrogen atom of nta or bpy constitutes another factor that can participate in the inter- or/and intramolecular redox processes. Reducing properties of a nitrogen-containing ligands were also observed during thermal transformations of other coordination compounds (Ingier-Stocka and Bogacz 1989; Jacewicz et al 2014). …”