Wydział Chemii

Elżbieta Gumienna-Kontecka

Joanna Gałęzowska

Marcin Drag

Rafał Latajka

Paweł Kafarski

Henryk Kozłowski

2004

Inorganica Chimica Acta

357

1632-1636

10.1016/j.ica.2003.11.033

Naukowa

Angielski

Artykuł

The formation constants of equimolar and bis-chelate copper(II) and zinc(II) complexes with three aliphatic and four aromatic-substituted β-aminophosphonates have been determined in water solution by potentiometric studies. Spectroscopic parameters clearly indicate involvement of {NH₃, PO₃ ²⁻} in both metal ions coordination. The comparison of the stability constants reveals slightly higher coordination power of the aliphatic-substituted β-aminophosphonic acids, which may be due to the higher basicity of their amino groups. All studied ligands are more effective in Cu²⁺ and Zn²⁺ coordination than phosphonic analogue of simple β-amino acid. The formation constants and structure of copper(II) and zinc(II) complexes with aliphatic and aromatic-substituted β-aminophosphonates have been determined in water solution by potentiometric and spectroscopic methods. The comparison of the stability constants reveals that all studied ligands are more effective in Cu²⁺ and Zn²⁺ coordination than phosphonic analogue of simple β-amino acid.

Cu(II) and Zn(II) complexes, Aminophosphonic acids, Potentiometry, UV–Vis, EPR and NMR spectroscopy

https://doi.org/10.1016/j.ica.2003.11.033

http://www.elsevier.com