Please use this identifier to cite or link to this item: http://nopr.niscair.res.in/handle/123456789/21096
Title: Kinetic and equilibrium studies of the acid dissociation of the zinc(II) complexes of N,N' -dialkyl-1, 10-phenanthroline-2,9-dimethanamine ligands
Authors: Sun, Hongwei
Lin, Huakuan
Zhou, Zhifen
Zhao, Guanghua
Zhu, Shourong
Su, Xuncheng
Chen, Yunti
Issue Date: Apr-2000
Publisher: NISCAIR-CSIR, India
Abstract: The complexation property and the acid dissociation kinetics of the zinc(II) complexes of N,N' -dialkyl-1, 10-phenanthroline-2,9-dimethanamine ligands have been studied using pH-metric and a stopped-flow spectrophotometer. In 3.3×10-3 ~1.2×10-2 mol dm-3 HCl (I=0.5 mol dm-3, HCl + NaCl), the dissociation rate follows the law kobs= kK'[H+]. The acid dissociation can be rationalized in terms of four-step kinetic process involving two rapid pre-equilibrium protonations and rate-determining cleavage of the Zn(II)-N(phenanthroline) bond. Steric effects on the stability of complexes and on the kinetic process have also been discussed.
Page(s): 430-433
URI: http://hdl.handle.net/123456789/21096
ISSN: 0975-0975(Online); 0376-4710(Print)
Appears in Collections:IJC-A Vol.39A(04) [April 2000]

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