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

نویسندگان

  • Ardeshir Shokrollahi Department of Chemistry, Faculty of Sciences, University of Razi, Kermanshah, I.R. IRAN
  • Jahanbakhsh Ghasemi Department of Chemistry, Faculty of Sciences, University of Razi, Kermanshah, I.R. IRAN
چکیده مقاله:

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+.

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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

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عنوان ژورنال

دوره 20  شماره 1

صفحات  22- 28

تاریخ انتشار 2001-06-01

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