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- W2054603923 abstract "The interaction of adenosine-5'-monophosphate (5'-AMP), guanosine-5'-monophosphate (5'-GMP) and 2'-deoxyguanosine-5'-monophosphate (5'-dGMP) with the [Co(NH3)6]3+, [Co(NH3)5Cl]2+ and [Co(NH3)4Cl2]+ cations has been investigated in aqueous solution with metal/nucleotide ratios (r) of 1/2, 1 and 2 at neutral pH. The solid complexes have been isolated and characterized by FT-IR and 1H-NMR spectroscopy. The complexes are polymeric in nature both in the crystalline solid and aqueous solution. The binding of the cobalt-hexammine cation is indirectly (via NH3) through the N-7 and the PO3(2-) groups of the AMP and via O-6, N-7 and the PO3(2-) of the GMP and dGMP anions (outer-sphere). The cobalt-pentammine and cobalt-tetrammine bindings are through the phosphate groups (inner-sphere) and the N-7 site (outer-sphere) of these nucleotide anions. The ribose moiety shows C2'-endo/anti conformation, in the free AMP and GMP anions as well as in the cobalt-ammine-AMP complexes, whereas a mixture of teh C2'-endo/anti and C3'-endo/anti sugar puckers were observed for the Co(NH3)6-GMP, Co(NH3)5-GMP and a C3'-endo/anti conformer for the Co(NH3)4-GMP complexes. The deoxyribose showed an O4'-endo/anti conformation for the free dGMP anion and a C3'-endo/anti for the Co(NH3)6-dGMP, Co(NH3)5-dGMP and Co(NH3)4-dGMP complexes." @default.
- W2054603923 created "2016-06-24" @default.
- W2054603923 creator A5039592061 @default.
- W2054603923 date "1991-06-01" @default.
- W2054603923 modified "2023-09-26" @default.
- W2054603923 title "Interaction of Purine Nucleotides with Cobalt-Hexammine, Cobalt-Pentammine and Cobalt- Tetrammine Cations. Evidence for the Rigidity of Adenosine and Flexibility of Guanosine and Deoxyguanosine Sugar Conformations" @default.
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- W2054603923 doi "https://doi.org/10.1080/07391102.1991.10507877" @default.
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