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Role of ionic strength in the kinetics of formation of the monochelate of nickel(II) with heptane‐3,5‐dione
Author(s) -
Moyá María Luisa,
Rodriguez Amalia,
Sánchez Francisco,
Blanco Carlos,
Hynes Michael J.
Publication year - 1992
Publication title -
international journal of chemical kinetics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.341
H-Index - 68
eISSN - 1097-4601
pISSN - 0538-8066
DOI - 10.1002/kin.550240405
Subject(s) - chemistry , heptane , nickel , ionic strength , kinetics , sodium perchlorate , inorganic chemistry , aqueous solution , solvation , salt (chemistry) , ligand (biochemistry) , reaction rate , ionic bonding , solvent , ion , organic chemistry , catalysis , electrochemistry , biochemistry , physics , receptor , electrode , quantum mechanics
The kinetics and mechanism of the reaction of Ni(II) with heptane‐,5‐dione (Hhptd) have been investigated in concentrated sodium perchlorate aqueous solutions at 298 K. The kinetic data in the different media are consistent with a mechanism in which Ni(II) reacts with the enol form of the ligand. The observed positive salt effect on the rate of the reaction of formation of the complex Nihptd + is rationalized taking into account the increase of the rate of water exchange from the first solvation sphere of the metal ion to the bulk solvent when increasing salt concentration.