Journal Title
Title of Journal: Transition Met Chem
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Abbravation: Transition Metal Chemistry
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Publisher
Springer Netherlands
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Authors: Jonathan F Ojo Grace O Ogunlusi Titilayo Adegoke
Publish Date: 2007/06/07
Volume: 32, Issue: 5, Pages: 662-665
Abstract
The reductions of CoCN5NO23− CoNH35NO22+ and CoNH35ONO2+ by TiIII in aqueous acidic solution have been studied spectrophotometrically Kinetic studies were carried out using conventional techniques at an ionic strength of 10 mol dm−3 LiCl/HCl at 250 ± 01 °C and acid concentrations between 0015 and 0100 mol dm−3 The secondorder rate constant is inverse—acid dependent and is described by the limiting rate law k2 ≈ k0 + kH+−1where k=k′Ka and Ka is the hydrolytic equilibrium constant for TiH2O63+ Values of k0 obtained for CoCN5NO23− CoNH35NO22+ and CoNH35ONO2+ are 131 ± 005 × 10−2 dm3 mol−1 s−1 453 ± 008 × 10−2 dm3 mol−1 s−1 and 17 ± 008 × 10−2 dm3 mol−1 s−1 respectively while the corresponding k′ values from reductions by TiOH2+ are 1027 ± 045 dm3 mol−1 s−1 1499 ± 070 dm3 mol−1 s−1 and 1793 ± 078 dm3 mol−1 s−1 respectively Values of K a obtained for the three complexes lie in the range 1–2 × 10−3 mol dm−3 which suggest an outersphere mechanism
Keywords:
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- Synthesis and X-ray crystal structures of a series of 3d–4f lanthanide complexes: lanthanide(III)–copper(II) coordination polymers with 2,5-pyridinedicarboxylic acid ligand
- Intermediates in reactions of the diimine complex trisferrozineiron(II) with hydroxide or cyanide in binary aqueous solvent mixtures and in micelles
- A novel series of nickel(II)-dppe-arylazoimidazole complexes. Synthesis and spectroscopic characterization
- Gold(I)-Gold(III)-4,4′-bpy-phosphine complexes: Synthesis and multinuclear NMR study
- A copper(II) complex of the Schiff base from l -valine and 2-hydroxy-1-naphthalidene plus 1,10-phenanthroline: synthesis, crystal structure, and DNA interaction
- Biophysical, spectroscopic and biochemical investigation of DNA–Cu(II)-GSH interactions
- Kinetics and mechanism of substitution of iron(II)–triazine complexes by 1,10-phenanthroline
- Three coordination polymers constructed from bis(imidazol-l-yl-methyl)benzene: syntheses, structures, and third-order nonlinear optical properties
- Synthesis and photophysical characterization of ruthenium(II) and platinum(II) complexes with bis-pyridylethynyl-phenanthroline ligands as a metalloligand
- DNA binding and photocleavage properties of two mixed-ligand oxovanadium complexes
- Infrared and Raman spectroscopic characterization of the phosphate mineral kosnarite KZr 2 (PO 4 ) 3 in comparison with other pegmatitic phosphates
- A series of trinuclear sandwich-like cyanide-bridged iron(III)-manganese(II) complexes: synthesis, crystal structures, and magnetic properties
- Synthesis and physico-chemical studies on transition metal complexes of symmetric bis -Schiff base ligands
- Exchange coupling in di-μ-hydroxo-bridged chromium(III) dimers
- Inner sphere oxidation of N , N ′-ethylenebis(isonitrosoacetyleacetoneimine)copper(II) by N -bromosuccinimide in aqueous weakly acidic solutions
- Initial state and transition state solvation in substitution at the square-planar complexes, [PtCl 4 ] 2− and [Pd(Et 4 dien)Cl] +
- Detection of single nucleotide polymorphisms by the specific interaction between transition metal ions and mismatched base pairs in duplex DNA
- Catalysis of the coupling reaction of aryl chlorides with bis(pinacolato)diboron by tricyclohexylphosphine-cyclopalladated ferrocenylimine complexes
- Ruthenium(III) – catalyzed oxidative cleavage of p -aminoazobenzene by chloramine-B in alkaline medium and uncatalyzed reaction in acid medium: spectrophotometric kinetic and mechanistic study
- An oxovanadium(IV) complex of an l -serine Schiff base and 1,10-phenanthroline: synthesis, crystal structure, and DNA and albumin-binding properties
- Mössbauer study of some iron(III) complexes with urea type ligands and the crystal structure of hexakisdimethylureairon(III) perchlorate
- Preparation and characterization of Co(II), Ni(II) and Cu(II) complexes of a ligand containing 1,3,4-thiadiazole groups
- Syntheses, crystal structures, and magnetic and fluorescence properties of three complexes of mixed flexible N,N′-bis(3-pyridylmethyl)amine and rigid pyromellitate ligands
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