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Potentiometric Study of Binary and Mixed Complexes of Imidazole, Histamine, Histidine and Diacetyl Monooxime with Some Transition Metal Ions in Aqueous Solution

Authors :
Jahanbakhsh Ghasemi
Ardeshir Shokrollahi
Source :
Iranian Journal of Chemistry & Chemical Engineering, Vol 20, Iss 1, Pp 22-28 (2001)
Publication Year :
2001
Publisher :
Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR, 2001.

Abstract

The complexation reactions between diacetyl monooxime (Damo), imidazole (Him), histamine (Hist) and histidine (His) with Co2+, Ni2+ and Cu2+ were studied potentiometrically in aqueous solution at 25 °C and m= 0.5 M KNO3. The overall stability constants log b's of species were obtained by computer refinement of pH-volume data using BEST computer program. Several models were tested and, based on the lowest sFIT , the best one is accepted. The main species in binary complexes are MAH, MA2, MA2H, MA2H2, (in MA3 and MA4 A=Him), and for ternary complexes are MAB, MA2B, MAB2 and MABH. The D log KMAB and log XMAB were calculated for MAB mixed complexes. The order found for the resulting stability constants vary as Co2+ < Ni2+ < Cu2+.

Details

Language :
English
ISSN :
10219986
Volume :
20
Issue :
1
Database :
Directory of Open Access Journals
Journal :
Iranian Journal of Chemistry & Chemical Engineering
Publication Type :
Academic Journal
Accession number :
edsdoj.f0b061ed914d4f179b8cfc3ca431e146
Document Type :
article