Thermodynamics and kinetics of the nickel(II)-salicylhydroxamic acid system. Phenol rotation induced by metal ion binding.

@article{Garca2007ThermodynamicsAK,
  title={Thermodynamics and kinetics of the nickel(II)-salicylhydroxamic acid system. Phenol rotation induced by metal ion binding.},
  author={Bego{\~n}a Garc{\'i}a and Sheila Ben{\'i}tez Gonz{\'a}lez and Francisco J. Hoyuelos and Saturnino Ibeas and J M Leal and M L Senent and Tarita Biver and F. Secco and Marcella Venturini},
  journal={Inorganic chemistry},
  year={2007},
  volume={46 9},
  pages={
          3680-7
        }
}
The kinetics and the equilibria of Ni(II) binding to p-hydroxybenzohydroxamic acid (PHBHA) and salicylhydroxamic acid (SHA) have been investigated in an aqueous solution at 25 degrees C and I=0.2 M by the stopped-flow method. Two reaction paths involving metal binding to the neutral acid and to its anion have been observed. Concerning PHBHA, the rate constants of the forward and reverse steps are k1=(1.9+/-0.1)x10(3) M-1 s-1 and k-1=(1.1+/-0.1)x10(2) s-1 for the step involving the undissociated… CONTINUE READING

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