Cobalt(II), nickel(II) and copper(II) complexes with adenosine 5'-monophosphate and cytidine 5'-monophosphate in aqueous solutions and in solids

• Autorzy: Gąsowska A. , Łomozik L.
• Języki publikacji: EN

Abstrakty

EN

Determination of stability constants and calculation of distribution of complexes formed by Co(II), Ni(II) and Cu(II) with adenosine monophosphate (AMP) and cytidine monophosphate (CMP) were performed by using computer -aided analysis of potentiometric titration data. On the basis of the comparison of the protonation constants of free ligands and MHL-type complexes the proton localization in the coordination compounds was established. The coordination mode in complexes in solution as well as in solids was determined from the results of spectral as well as equilibrium studies. Formation of macrochelate complexes and the occurrence of coordination dichotomy of the N(1)N(7) type as well as N(1)N(7)/O (phosphate group) was evidenced. Contrary to the similar complexes with Cu(II) and Co(II), the phosphate group of the nucleotide becomes essentially involved in the interactions with Ni(II) ions only at high pH values. The modes of coordination in aqueous solution and solid complexes are compared.

Słowa kluczowe

EN

complexes; Co(II); Ni(II); Cu(II); nucleotides

• Wydawca: Polskie Towarzystwo Chemiczne
• Czasopismo: Polish Journal of Chemistry
• Rocznik: 1999
• Tom: vol. 73 nr 3
• Strony: 465--474

Twórcy

autor

Gąsowska A.

autor

Łomozik L.

• Wydzial Chemii Uniwersytet Adama Mickiewicza ul. Grunwaldzka 6 60-780 Poznań