The pressure-jump method has been used to determine the rate constants for the formation and dissociation of nickel(I1) and cobalt(I1) complexes with cinchomeronate in aqueous solution at zero ionic strength. The forward and reverse rate constants obtained are k, = 2.27 x lo6 M-' s-' and k, = 3.81 x
Metal-ion interaction with penicillins: Kinetics of complexation of nickel(II)
β Scribed by G. V. Fazakerley; G. E. Jackson
- Publisher
- John Wiley and Sons
- Year
- 1977
- Tongue
- English
- Weight
- 352 KB
- Volume
- 66
- Category
- Article
- ISSN
- 0022-3549
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β¦ Synopsis
The kinetics of complexation of nickel(II) with some penicillins and related compounds show that the zwitterionic form of the ligand has very low reactivity compared to the anionic form. The resolved rate constants are interpreted in terms of binding to the ring nitrogen and carboxyl group and not to the side chain.
π SIMILAR VOLUMES
The kinetics of complexation of Ni(II) by pterin was studied in aqueous solutions with a stopped-flow apparatus under conditions of pseudo-first order in the temperature range 5-45ΠC, pH between 4.0 and 6.5, and ionic strength 0.4 M. The equilibrium constants, stoichiometry, and pK a of the ligand a