Thermoanalytical study of linkage isomerism in coordination compounds. Part 5: A DSC and DFT study on the linkage isomerization of the dinitrito and dinitro isomers of cis-tetraamminecobalt(III) complexes

Thermal linkage isomerization of dinitrito cis-[Co(NH3)4(ONO)2]X and dinitro cis-[Co(NH3)4(NO2)2]X (X = Cl−, NO3−, ClO4−) complexes were investigated by DSC in the solid state. The observed DSC peak was resolved into two peaks, corresponding to two isomerization stages. A comparative experimental and DFT study was performed on the thermodynamic and kinetic isomerization.