%0 Journal Article
%T Studies On Some Acid Divalent-Metal Nitrilotriacetate Complexes
%A E. R. Souaya
%A W. G. Hanna
%A E. H. Ismail
%A N. E. Milad
%J Molecules
%D 2000
%I MDPI AG
%R 10.3390/51001121
%X IR and 1H-NMR studies on nitrilotriacetic acid (H3NTA) suggest that the acid exists in the zwitterion form, which allows the existence of intermolecular hydrogen bonding. A tetrahedral structure is established for eleven (1:1) anhydrous acid-metal (II) nitrilotriacetates complexes. The ten Dq values for the colored complexes were determined spectrophotometrically. The pKa values for the eleven acid metal complexes [M(HNTA)].(OH2)3] were determined and compared with the corresponding pKa values of the [M(OH2)n]+2 ions and also with the log ¦Â1 values of the corresponding [M(NTA)]- complexes. X-ray diffraction studies on the ligand and on eight of these complexes are described.
%K nitrilotriacetic acid
%K nitrilotriacetates complexes
%K pKa values
%K X-ray diffraction
%U http://www.mdpi.com/1420-3049/5/10/1121