Kinetics and mechanism of tetradentate nickel(II) chelate and metal nitrilotriacetate promoted hydrolysis of methyl glycinate: an isokinetic relation

Comparative studies of coordination properties of puromycin and puromycin aminonucleoside towards copper(II) ions

“…The respective pK a values are consistent with the literature on similar amino groups [22,[27][28][29][30][31][32].…”

Molecular recognition of organic ammonium ions in solution using synthetic receptors

“…Bipyridines (bpy) or nitrilotriacetic acid (NTA) are widely used as ligands. A typical example are [Cu(NTA)]-complexes, which co-ordinate amino acids [661–662]. Binding affinities have been determined for a variety of amino acids in aqueous medium (Table 14).…”

Extrathermodynamic relationships in copper(II) chelate promoted hydrolysis of methyl glycinate

“…Visible spectra of these solutions did not change up to a = 2, indicating that Cu(PAA) formation was complete even at the lowest pH; therefore, the formation constant could not be determined by standard potentiometric techniques. The value of log K (eq 7), determined by Schwarzenbach's competing ligand me-Cu2++ PAA2" ZCu(PAA) (7) thod,16 was 13.8 ± 0.2 at 25 °C and 0.10 M (KN03).…”

“…In Figure 7, it can be seen that AS* is related to the charge of the complex. The most positive complexes have the least negative entropies of activation because of the cancellation of (3) Cu(PAA), ( 4) Cu(NTA)-, ( 5) Cu(DPA)2+, (6) Cu(dien)2+, (7) Cu(terpy)2+, (8) Cu(IMDA), (9) Xi(tren)2+, (10) Ni(trien)2+, (11) Ni(EDDA), (12) Ni(NTA)-.…”

“…Figure 5. Correlation of log Kx with log fc0H for a series of Cu-(L)(MeGly)*+ complexes: (1) Cu(tren)24",(2) Cu(DTMA)+, (3) Cu(PAA), (4) Cu(NTA)",(5) Cu(DPA)2+, (6) Cu(dien)2+,(7) Cu(terpy)2+.…”