The effects of multivalent anions on the aluminium ion-assisted aquation of the pentaamminefluorocobalt(III) complex.
スポンサーリンク
概要
- 論文の詳細を見る
The presence of multivalent anions, such as sulfate, oxalate, and malonate ions, accelerated the aluminium ion-assisted aquation of CoF(NH<SUB>3</SUB>)<SUB>5</SUB><SUP>2+</SUP> and gave the anionopentaamminecobalt(III), along with the aqua complex. The competition reaction for the sulfate ion showed a saturation of the product percentage (33% CoSO<SUB>4</SUB>(NH<SUB>3</SUB>)<SUB>5</SUB><SUP>+</SUP>) at nearly [SO<SUB>4</SUB><SUP>2−</SUP>]<SUB>total</SUB>=0.1 mol dm<SUP>−3</SUP>, while the saturation of the reaction rate was observed at a higher sulfate concentration. This difference can be explained by a scheme in which the reaction proceeds through two intermediates, CoF(NH<SUB>3</SUB>)<SUB>5</SUB><SUP>2+</SUP>·SO<SUB>4</SUB><SUP>2−</SUP>·Al<SUP>3+</SUP> and SO<SUB>4</SUB><SUP>2−</SUP>·CoF(NH<SUB>3</SUB>)<SUB>5</SUB><SUP>2+</SUP>·SO<SUB>4</SUB><SUP>2−</SUP>·Al<SUP>3+</SUP>. The reaction for the oxalate and malonate ions gave extremely large yields (more than 90%) of CoA(NH<SUB>3</SUB>)<SUB>5</SUB><SUP>+</SUP> (A<SUP>2−</SUP>=oxalate ion or malonate ion) when [A<SUP>2−</SUP>]<SUB>total</SUB>/[Al<SUP>3+</SUP>]<SUB>total</SUB>>2, and the reaction rates showed a maximum at approximately [A<SUP>2−</SUP>]<SUB>total</SUB>/[Al<SUP>3+</SUP>]<SUB>total</SUB>=2. These specific effects can be attributed both to the strong affinities of the dicarboxylate ions for the aluminium ion and to the residual capacity of the aluminium-bonded dicarboxylate ions for coordinating with cobalt(III).
- 公益社団法人 日本化学会の論文
著者
-
Iida Masayasu
Department Of Chemistry Faculty Of Science Nara Women's University
-
Yamatera Hideo
Department of Chemistry, Faculty of Science, Nagoya University
-
Ando Mieko
Department of Chemistry, Faculty of Science, Nara Women's University
-
Ando Mieko
Department of Chemistry, Faculty of Science, Nara Women's University
関連論文
- Multinuclear NMR Studies on Micellar Formation of Aqueous [Co(N-octyl- or N-dodecylethylenediamine)(3,7-Diazanonane-1,9,-diamine)】^ Solutions
- ^CoNMR Spectroscopic Chiral Discrimination of [Co(en)_3]^Enantiomers in Ionic Interacting Systems
- Chiral Discrimination in the Interactions between [Co(en)_3]^ and Cholesteric Liquid Crystals by ^Co NMR Spectroscopy
- A Molecular Structure of Bis(N-octylethylenediamine) zinc (II) Nitrate in Crystal and the Aggregations in Wet Chloroform and Benzene Solutions
- A Novel Reverse Micellar System Composed of Bis(octylethylenediamine)zinc(II)Chloride in Aqueous Benzene and Chloroform Solutions
- Formation of Palladium(0) Nanoparticles from a Microemulsion System Composed of Bis(N-octylethylenediamine)palladium(II) Chloride Complex
- Formation of Stable Molecular Glasses of Yttrium(III) Acyl-DL-Alaninate Complexes
- Hydrophilic-Hydrophobic Balance of Bis(octylethylenediamine) Zn(II), Cd(II), and Pd(II) Chlorides in Methanol/Water and Chloroform/Water Systems
- Solvent Effects on ^Co Chemical Shifts for Tripositive Cobalt(III) Complex Ions
- ^Co Nuclear Quadrupole Interaction in Crystalline Δ-Tris[trans-(1R,2R)-1,2-diaminocyclohexane]cobalt(III) Chloride Trihydrate
- Evidence for the Change of the Electric Field Gradient in the ^Co NMR Relaxations of 〓-Tris(trans-(1R,2R)-1,2-diaminocyclohexane)cabalt (III) Cations by the Ion Pairing with Oxyanions
- NMR Studies on the Aggregation of Mononuclear and Dinuclear Cobalt (III) Amphiphilic Complexes Having Alkyl Chains
- Effect of nucleophiles on the rates of dissociation and racemization of the tris(1,10-phenanthroline)iron(II) ion in aqueous solutions.
- The electronic structures of linear dicyano complexes.
- An oxygen exchange of arsenate and alkylarsonate ions with water.
- Spin-Lattice Relaxation Time Measurements of Ions and Water Molecules Containing Spin 1 Nuclei in Lyotropic Liquid Crystalline Systems.
- Isomerism of the metal complexes containing multidentate ligands. IX. structure of the meso isomer of (Co(hexaen))3+ (hexaen=1,4,7,10,13,16-hexaazacyclooctadecane)
- Association constants of optically active [Co(en)3]3+ with (+)-tartrate and fumarate ions determined from the kinetic data of hydrogen-deuterium exchange.
- The structure of ion-pairs of .LAMBDA.- and .DELTA.-[Co(en)3]3+ ions with L-tartrate and related anions as deduced from circular dichroism spectra.
- Preparation of sephadex derivatives with optically active groups and column-chromatographic application to the resolution of some cobalt(III) complexes.
- Four isomers of the bis(ethylenediamine)sarcosinatocobalt(III) ion: Separation, identification, and characterization.
- Electrostatic and hydrophobic interactions in the ion associations between tripositive complex ions and sulfonate anions.
- Lifetimes of ortho-positronium in benzene solutions of .BETA.-diketonates of iron(III) and cobalt(III).
- Kinetics of racemization and dissociation of tris(1,10-phenanthroline)- iron(II). Hydrophobic interaction between the complex cation and alkylammonium cations.
- 13CNMR Spectra of series of bis(2,2'-bipyridine)cobalt(III) and bis(1,10-phenanthroline)cobalt(III) complexes.
- An ab initio MO calculation for the bonding structure of (Ni(CN)4)2-.
- The effects of multivalent anions on the aluminium ion-assisted aquation of the pentaamminefluorocobalt(III) complex.
- Extended X-ray absorption fine structure studies in some aqueous copper(II) solutions.
- Isomerism of the metal complexes containing multidentate ligands. VIII. Chromatographic behavior of [CoN6]3+-type complexes on an SP-sephadex column.
- Isomers of the diamminebis(trimethylenediamine)cobalt(III) complex.