Das Chelierungsverhalten von Ce

Dissociation Constants of some Quinoline Derivatives in Mixed Solvent Mixture

“…Thus, the presence of different substituent influences the dissociation of compound due to their different effects [20]. Similar results have been reported by earlier studies on pyrimidine compounds where polarity of substituent affects basicity of compounds [21].…”

Dissociation Constants of some Quinoline Derivatives in Mixed Solvent Mixture

“…The more acidic character of SB-2 is because of negative inductive effect of 4-CH 3 group. Thus, the presence of different substituent influences the dissociation of compound due to their different effects [20]. Similar results have been reported by earlier studies on pyrimidine compounds where polarity of substituent affects basicity of compounds [21].…”

Molecular mechanics, quantum mechanics, potentiometric, and conductometric studies on the complexes of some rare earth metals with 5‐azorhodanine derivatives

“…This is reasonable because the presence of p ‐OCH 3 and p ‐CH 3 groups (i.e., an electron‐donating effect) will enhance the electron density by their high positive inductive or mesomeric effect, whereby stronger chelation was formed and therefore the stability of the complexes. The low stability of p ‐NO 2 and p ‐Cl complexes can be attributed to the presence of NO 2 and Cl group in the p ‐position relative to the azo group, respectively. This is caused by the negative inductive effect of NO 2 and Cl group, which decreases its ability for chelation and therefore the stability of the complexes. For the ligands with the same metal ion at constant temperature, the stability of the chelates increases in the order p ‐OCH 3 > p ‐CH 3 > p ‐H > p ‐Cl > p ‐NO 2 40.…”

“…For the ligands with the same metal ion at constant temperature, the stability of the chelates increases in the order p ‐OCH 3 > p ‐CH 3 > p ‐H > p ‐Cl > p ‐NO 2 40.…”