Oxovanadium(iv and v) and copper(ii) complexes of N-salicyl-glycylglycine and N-salicyl-glycylglycylglycine

Mechanistic Studies of Gd3+‐Based MRI Contrast Agents for Zn2+ Detection: Towards Rational Design

“…Indeed, at this pH, there is no other possible site of deprotonation because the tertiary amines are all coordinated to one of the two Cu 2+ ions, thus they are not protonated. The hydrolysis constant of the complex (−7.19) is lower compared to that of the aqua ion (−7.67)26 implying higher acidity of the water molecule in the complex, as previously observed for other Cu 2+ complexes,31 and complexes formed with other metal ions, such as Ln 3+ 32…”

Binding of Oxovanadium(IV) to Tripeptides Containing Histidine and Cysteine Residues and Its Biological Implication in the Transport of Vanadium and Insulin‐Mimetic Compounds

“…To evaluate the “basicity adjusted” stability constant, we assume the following reaction: VO 2+ + H 3 L 2+ → VOLH 2 3+ + H + . A value of –1.28 is calculated for HisGlyGly, which can be compared with those for GlyGly (–1.43), GlyGlyGly (–1.59),19 Ala(–1.33),20 H 2 SalGly (–1.29),9b H 2 sal‐RGG (–1.56) and H 2 sal‐RGGG (–1.51),9f for which a pure carboxylate coordination has been substantiated. The EPR parameters (Table 2) support this assignment.…”

Vanadium(IV) and ‐(V) Complexes of Reduced Schiff Bases Derived from Aromatic o‐Hydroxyaldehydes and Tyrosine Derivatives

“…The bond lengths found for 3 are within the expected ranges and selected bond lengths and angles are included in Table 1. In SBs the C=N distances are typically 1.24–1.28 Å,26–31 and the C(8)–N(2) and C(9)–N(2) bond lengths of 1.498(3) and 1.493(3) Å, respectively, are consistent with the formation of single bonds 31,34,37…”