Disubstituierte Dithiocarbamate („Carbate”︁) als Fällungsreagenzien für Metalle

Gleu, Karl; Schwab, Ricardo S.

doi:10.1002/ange.19500621307

Cited by 157 publications

(19 citation statements)

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“…The 1,1-diiodotellurolane C 4 H 8 TeI 2 , 1,3-dihidro-2k 4 -benzotellurol-2-diiodide C 8 H 8 TeI 2 , 1-oxa-4,4-diio-dotellurane C 4 H 8 OTeI 2 and 1,1-diiodotellurane C 5 H 10 TeI 2 were prepared according to the methods described by Ziolo and Gunther [21]. The sodium salts of diethyl-dithiocarbamate and pyrrolidinyl-N-carbodithioate were prepared according to literature [22]. IR spectra were recorded in the region 4000-500 cm À1 as KBr pellets using a Bruker spectrometer.…”

Section: Methodsmentioning

confidence: 99%

Synthesis and spectroscopic characterization of six new monosubstituted dithiocarbamate compounds containing organotellurium(IV) heterocycles: Single-crystal structures of C5H10TeI[S2CN(CH2CH3)2], C4H8TeI[S2CN(CH2CH2)2], C4H8OTeI[S2CN(CH2CH2)2] and C5H10TeI[S2CN(CH2CH2)2]

Cotero-Villegas

Garcia

Höplf-Bachner

et al. 2010

Journal of Organometallic Chemistry

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Section: Methodsmentioning

confidence: 99%

Synthesis and spectroscopic characterization of six new monosubstituted dithiocarbamate compounds containing organotellurium(IV) heterocycles: Single-crystal structures of C5H10TeI[S2CN(CH2CH3)2], C4H8TeI[S2CN(CH2CH2)2], C4H8OTeI[S2CN(CH2CH2)2] and C5H10TeI[S2CN(CH2CH2)2]

Cotero-Villegas

Garcia

Höplf-Bachner

et al. 2010

Journal of Organometallic Chemistry

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“…The complexes were prepared by Standard procedure of metathesis between the sodium diethyldithiocarbamate and the appropriate metal sah in aqueous medium [5,6]. In the case of cobalt, the Co[dedtc]2, primarily formed, was aerially oxidized until the desired Co[dedtc]3 complex was obtained.…”

Section: Methodsmentioning

confidence: 99%

Ligand Radioisotopic Exchange Reaction of Diethyldithiocarbamato Complexes of Fe (III), Co(lll) and Ni(ll) in Dioxane and Dimethylformamide

Kostański

Magas

1980

Radiochimica Acta

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Using radiotracer technique and extraction Separation of reactants, the kinetics of the ligand isotopic exchange reaction of diethyldithiocarbamato complexes of Fe(III), Co(III) and Ni(II) in dioxane and dimethylformamide has been studied. MCKAY's plots are linear, and no zero time exchange has been observed. The exchange reaction is very slow for the cobalt complex, whereas for the iron and nickel complexes the reaction is very fast. The ligand exchange reaction for the cobalt complex seems to be of the first order with respect to the complex, and of zero order with respect to the ligand, which suggests the S^i mechanism. Activation energy and activat'ion entropy for this reaction in dimethylformamide are 88.4±8.9 kJ/mol and 48.8±25.2 J/mol-K respectively.

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“…When 3 ml of 0.1 mol/l solution of HMDTC -is introduced, the desired pH was established again with a few milliliters of 0.1 mol/l HNO 3 . During 15 min of stirring, Co(II) oxidized to Co(III), and a green precipitate of Co(HMDTC) 3 occurs that acts as collector for our metals (Glen 1950, Krishnamurty 1977, Byr ' ko 1984, Cundeva et al 2000. During this process, analytes were taken up in this collector.…”

Section: Flotation Proceduresmentioning

confidence: 97%

Determination of zinc, nickel and cadmium in natural water samples by flame atomic absorption spectrometry after preconcentration with ion exchange and flotation techniques

Koyuncu

Akçin

2011

Reviews in Analytical Chemistry

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Two preconcentration techniques, ion exchange and fl otation, were used for the determination of zinc (Zn), nickel (Ni) and cadmium (Cd) in natural water samples. In the fi rst part of our work, the adsorption of zinc(II), nickel(II) and cadmium(II) on Lewatit TP 207 chelating resin containing iminodiacetate groups was studied at different pH values by a batch process. The effects of parameters such as amount of resin, contact time, pH and initial metal concentration on the ion exchange separation were investigated. For the determination of the adsorption behavior of the resin, the adsorption isotherms of metal ions were also studied. The concentrations of metal ions were measured by batch techniques and with atomic absorption spectrometry analysis. Adsorption analysis results obtained at various concentrations showed that the adsorption pattern on the resin followed Langmuir and Freundlich isotherms. The effi ciency of removal is higher for Ni and Zn than Cd ions. Here, we report the method that is applied for the sorption and separation of some toxic metals from the solutions. In the second part of our work, the fl otation technique was used for preconcentration. The ability of Co(III) hexamethylenedithiocarbamate, Co(HMDTC) 3 , as a fl otation collector for metals from natural waters was investigated. The fl otation method was compared with the ion exchange method. The recoveries of Zn, Cd and Ni from natural water samples were approximately 99 % . Our results showed that the two methods were very effective, but the fl otation results were higher than the ion exchange results. In the present study, a method was described for the determination of Zn, Ni and Cd by fl ame atomic absorption spectrometry (FAAS) after preconcentration and separation in water by ion exchange resin and fl otation. Results of these two methods are compared. Analytical parameters such as precision and accuracy of methods were also studied. The equilibrium experimental results of Zn, Ni and Cd ions exchanged were fi tted by Langmuir-Freundlich adsorption isotherm models.

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Disubstituierte Dithiocarbamate („Carbate”︁) als Fällungsreagenzien für Metalle

Cited by 157 publications

References 0 publications

Synthesis and spectroscopic characterization of six new monosubstituted dithiocarbamate compounds containing organotellurium(IV) heterocycles: Single-crystal structures of C5H10TeI[S2CN(CH2CH3)2], C4H8TeI[S2CN(CH2CH2)2], C4H8OTeI[S2CN(CH2CH2)2] and C5H10TeI[S2CN(CH2CH2)2]

Synthesis and spectroscopic characterization of six new monosubstituted dithiocarbamate compounds containing organotellurium(IV) heterocycles: Single-crystal structures of C5H10TeI[S2CN(CH2CH3)2], C4H8TeI[S2CN(CH2CH2)2], C4H8OTeI[S2CN(CH2CH2)2] and C5H10TeI[S2CN(CH2CH2)2]

Ligand Radioisotopic Exchange Reaction of Diethyldithiocarbamato Complexes of Fe (III), Co(lll) and Ni(ll) in Dioxane and Dimethylformamide

Determination of zinc, nickel and cadmium in natural water samples by flame atomic absorption spectrometry after preconcentration with ion exchange and flotation techniques

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