Thermodynamics of complex formation in dimethylsulfoxide: The case of Co(II) complexes with nitrogen donor ligands and their O2 adducts

[Display omitted] •The stability of the Co(II) species decreases with the number of N-methyl groups.•Solvation effects of metal ion and ligand solvation compensate each other in DMSO.•N-methylation modulates the CoLj3+/2+ redox potential and thus the O2 affinity.•Correlation between the ΔH°β1, elect...

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