Cu(II) is a metal ion, the aqueous chemistry of which with carboxylic acids draws intense interest, targeting new materials and exemplifying diverse and unique structure–reactivity correlations. Driven by the need to explore the interplay of the chemical interactions of Cu(II) with polycarboxylic acid substrates and the association of such reactivity with lattice architecture and physicochemical properties, binary and ternary systems of Cu(II)

Vanadium involvement in cellular processes requires deep understanding of the nature and properties of its soluble and bioavailable forms arising in aqueous speciations of binary and ternary systems. In an effort to understand the ternary vanadium–H2O2–ligand interactions relevant to that metal ion’s biological role, synthetic efforts were launched involving the physiological ligands betaine (Me3N+CH2CO2–) and H2O2. In a pH-specific fashion,