Topic
Aquation
About: Aquation is a research topic. Over the lifetime, 1443 publications have been published within this topic receiving 17507 citations.
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TL;DR: In this article, the preparation of iron(II) complexes of bi-, tri-, quadri-, quinque-, and sexi-dentate Schiff bases is reported. But the reaction of these complexes with cyanide is not discussed.
Abstract: Preparations of iron(II) complexes of bi-, tri-, quadri-, quinque-, and sexi-dentate Schiff bases are reported. The Schiff-base ligands are derived from pyridine-2-carbaldehyde, phenyl 2-pyridyl ketone, pyridine-2,6-dicarb-aldehyde. or 2,6-diacetylpyridine, and appropriate amines. All these complexes aquate in acid solution, and react with cyanide to give ternary iron(II)–cyanide–Schiff-base complexes. The kinetics of aquation of several of these Schiff-base complexes, and the kinetics of cyanide attack at all the complexes, are described, and reactivities are compared with those for analogous reactions of other iron(II) di-imine complexes. Solvent effects on the re-activity with cyanide of one of the complexes of the sexidentate Schiff bases in a range of binary aqueous mixtures are discussed.
Journal Article•
TL;DR: In this paper, the reactions of hydrated electron (C - aq ) with Co(lll) polypyridyl complexes of the type [Co(NN) 2 Cl 2 ]Cl where NN = 2,2'-bipyridine (bpy), and 1.10-phenanthroline (phen) have been studied by pulse radiolysis.
Abstract: The reactions of hydrated electron (C - aq )with Co(lll) polypyridyl complexes of the type [Co(NN) 2 Cl 2 ]Cl where NN = 2,2'-bipyridine (bpy), and 1.10-phenanthroline (phen) have been studied by pulse radiolysis. The rate constants for the reactions at 300 K have been evaluated to he (7.6±0.2)x10 10 , and (6.9±0.2)x10 10 dm 3 mol -1 S -1 respectively. Time resolved transient absorption spectra show two broad peaks at 360 and 610 nm for the bpy complex and a single broad peak at 420 nm for the phen complex at I μs. Comparison with reported transient spectra ol' the anion radicals of ligands indicates that the electron is located on the complex as a whole. The anion radicals of both the complexes initially produced, decay in the lime scale of ∼80 μs. Steady state absorption spectra on irradiation point out to breakdown of the phen complex, and the bpy-Co(lll) complex is reduced to Co(II) complex. Conductance of the solution substantially increases on irradiation for both the complexes and can he attributed to aquation/de-ligation of the phen complex. The phen complex anion radical undergoes aquation/de-ligation by intramolecular electron transfer leading to dissociation of the complex. For bpy complex the conductance increases due to the release of chloride ions and reduction to Co(ll) complex species is observed.