Chromium(VI) Species and Spectra in Acidic Solutions

James Yingpeh Tong

doi:10.1021/ic50022a045

Solvent Extraction of Chromium(VI) with Tri-n-butyl Phosphate from Aqueous Acidic Solutions

Journal of Chemical & Engineering Data ◽

10.1021/je7002429 ◽

2007 ◽

Vol 52 (6) ◽

pp. 2220-2223 ◽

Cited By ~ 24

Author(s):

Weidong Zhang ◽

Junteng Liu ◽

Zhongqi Ren ◽

Changshun Du ◽

Jingnan Ma

Keyword(s):

Solvent Extraction ◽

Acidic Solutions ◽

Chromium Vi

A Spectrophotometric Investigation of the Equilibria Existing in Acidic Solutions of Chromium(VI)1-3

Journal of the American Chemical Society ◽

10.1021/ja01120a022 ◽

1953 ◽

Vol 75 (24) ◽

pp. 6180-6186 ◽

Cited By ~ 70

Author(s):

James Ying-peh Tong ◽

Edward L. King

Keyword(s):

Spectrophotometric Investigation ◽

Acidic Solutions ◽

Chromium Vi

Chromatographic determination of chromium(VI) with coulometric detection based on the electrocatalysis by adsorbed iodine of the reduction at platinum electrodes in acidic solutions

Analytical Chemistry ◽

10.1021/ac50024a019 ◽

1978 ◽

Vol 50 (2) ◽

pp. 240-243 ◽

Cited By ~ 40

Author(s):

J. H. Larochelle ◽

D. C. Johnson

Keyword(s):

Chromatographic Determination ◽

Platinum Electrodes ◽

Acidic Solutions ◽

Coulometric Detection ◽

Chromium Vi

Selective separation of chromium (VI) from acidic solutions containing various metal ions through emulsion liquid membrane using trioctylamine as extractant

Separation and Purification Technology ◽

10.1016/j.seppur.2008.08.005 ◽

2008 ◽

Vol 64 (1) ◽

pp. 56-62 ◽

Cited By ~ 60

Author(s):

R KUMBASAR

Keyword(s):

Metal Ions ◽

Liquid Membrane ◽

Selective Separation ◽

Emulsion Liquid Membrane ◽

Acidic Solutions ◽

Chromium Vi

Selective extraction of chromium (VI) from multicomponent acidic solutions by emulsion liquid membranes using tributhylphosphate as carrier

Journal of Hazardous Materials ◽

10.1016/j.jhazmat.2010.02.019 ◽

2010 ◽

Vol 178 (1-3) ◽

pp. 875-882 ◽

Cited By ~ 54

Author(s):

Recep Ali Kumbasar

Keyword(s):

Selective Extraction ◽

Liquid Membranes ◽

Acidic Solutions ◽

Chromium Vi ◽

Emulsion Liquid Membranes

Extraction of chromium (VI) from multicomponent acidic solutions by emulsion liquid membranes using TOPO as extractant

Journal of Hazardous Materials ◽

10.1016/j.jhazmat.2009.01.113 ◽

2009 ◽

Vol 167 (1-3) ◽

pp. 1141-1147 ◽

Cited By ~ 41

Author(s):

Recep Ali Kumbasar

Keyword(s):

Liquid Membranes ◽

Acidic Solutions ◽

Chromium Vi ◽

Emulsion Liquid Membranes

Kinetics of the Reaction of Chromium(VI) with Tris(1,10-phenanthroline)iron(II) Ions in Acidic Solutions. Anion and Medium Effects: Perchlorate versus Triflate

Inorganic Chemistry ◽

10.1021/ic0511524 ◽

2006 ◽

Vol 45 (3) ◽

pp. 1053-1058 ◽

Cited By ~ 4

Author(s):

Guodong Du ◽

James H. Espenson

Keyword(s):

Medium Effects ◽

Acidic Solutions ◽

Chromium Vi ◽

Kinetics Of

Amine extraction of chromium(VI) from aqueous acidic solutions

Separation and Purification Technology ◽

10.1016/s1383-5866(03)00153-9 ◽

2004 ◽

Vol 36 (1) ◽

pp. 63-75 ◽

Cited By ~ 31

Author(s):

Aynur Senol

Keyword(s):

Acidic Solutions ◽

Chromium Vi

Selective extraction and concentration of chromium(VI) from acidic solutions containing various metal ions through emulsion liquid membranes using Amberlite LA-2

Journal of Industrial and Engineering Chemistry ◽

10.1016/j.jiec.2010.05.004 ◽

2010 ◽

Vol 16 (5) ◽

pp. 829-836 ◽

Cited By ~ 32

Author(s):

Recep Ali Kumbasar

Keyword(s):

Metal Ions ◽

Selective Extraction ◽

Liquid Membranes ◽

Acidic Solutions ◽

Chromium Vi ◽

Emulsion Liquid Membranes

Kinetics and mechanism of the oxidation of alkenes by chromium(VI) in the presence of complexing agents

Journal of Chemical Research ◽

10.3184/0308234054497173 ◽

2005 ◽

Vol 2005 (2) ◽

pp. 73-79 ◽

Cited By ~ 2

Author(s):

Subbiah Meenakshisundaram ◽

M. Gopalakrishnan ◽

S. Nagarajan ◽

N. Sarathi ◽

P. Sumathi

Keyword(s):

Redox Process ◽

Complexing Agents ◽

Significant Extent ◽

Cinnamic Acids ◽

Acidic Solutions ◽

Catalytic Activities ◽

Chromium Vi ◽

Mechanistic Pathway ◽

Trans Stilbene ◽

Reactive Complex

The catalytic activities of 2,2′-bipyridyl (bipy) and oxalic acid (Oxa) in the HCrO4– oxidation of some substituted trans-cinnamic acids have been investigated in acidic solutions. The Cr(VI)–bipy and Cr(VI)–Oxa complexes are believed to be the probable reactive electrophiles in this redox process. The kinetic data reveal that electron-releasing groups enhance the reactivity to a significant extent while the electron-withdrawing ones reduce the rate marginally. It appears that the mechanism of bipy/Oxa catalysed chromium(VI) oxidation of unsaturated systems to the corresponding cleavage products involves an electrophilic attack of the reactive complex at the C–C double bond. The formation of a ternary complex as an intermediate is envisaged to describe the redox process. In this paper, we also report on the kinetic form of the oxidation of trans-stilbene to methyl 3-hydroxy-2,3-diphenylpropanoate. The mechanistic pathway has been determined based on the kinetic behaviour and the product assignment.