Solubility diagrams of the systems nickel sulfamate-water and cobalt sulfamate-water

Максін, В. І.; Standritchuk, O. Z.

doi:10.1134/s1070427207070063

Cited by 5 publications

(4 citation statements)

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“…The kinetics and mechanism of hydrolysis at 80–120 °C of sulfamic acid at pHs 1.5, 4.1, and 5.7 and the activation energy E max (142 kJ/mol) and entropy (Δ S 0 = 20 ± 2 J/mol·K) have been determined. The authors disagree with earlier research on the mechanism of hydrolysis and argue against a transition state (TS) containing a zwitterion favoring instead association of sulfamic acid molecules with water in the TS. The kinetics of hydrolysis of ammonium nitridotrisulfonate, ammonium imidodisulfonate, and ammonium sulfamate in aqueous acid solutions all producing ammonium sulfate have been examined (Scheme ).…”

Section: Sulfamic Acidmentioning

confidence: 66%

“…The kinetics of the dissolution and crystallization of sulfamic acid in water have been extensively probed. 66 The same group performed a detailed study of the solubility in water of sulfamic acid at temperatures from −6.2 to 103.2 °C, and phase diagrams are presented showing characteristic points in the sulfamic acid− water system. 67 They also looked at the thermodynamic aspects (free energies and enthalpies of dissolution and entropies) of the solubility of sulfamic acid and a large number of mono-, di-, and trivalent salts of sulfamates.…”

Section: Solubility Conductance and Miscellaneous Studiesmentioning

confidence: 99%

“…Several papers deal with the solubility of sulfamates in water. The kinetics of the dissolution and crystallization of sulfamic acid in water have been extensively probed . The same group performed a detailed study of the solubility in water of sulfamic acid at temperatures from −6.2 to 103.2 °C, and phase diagrams are presented showing characteristic points in the sulfamic acid–water system .…”

Section: Sulfamic Acidmentioning

confidence: 99%

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Sulfamic Acid and Its N- and O-Substituted Derivatives

2013

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Section: Sulfamic Acidmentioning

confidence: 66%

Section: Solubility Conductance and Miscellaneous Studiesmentioning

confidence: 99%

Section: Sulfamic Acidmentioning

confidence: 99%

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Sulfamic Acid and Its N- and O-Substituted Derivatives

2013

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“…45, n. 4, 2020, 32-39 ISSN: 1678-4618 DOI: 10.26850/1678-4618eqj.v45. 4.2020.p32-39 is easy to perform [3][4][5][6][7][8][9][10] . Maksin and Standritchuk 3 studied the water solubility of Ni(II) and Co(II) sulfamates.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, characterization, and thermal behavior of amidosulfonates of transition metals in air and nitrogen atmosphere

Luiz

Nunes

2020

Eclet. Quim. J.

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The amidosulfonates of Mn2+, Co2+, Ni2+, Cu2+ and Zn2+ were prepared by the direct reaction between the metal carbonate and the amidosulfonic acid with heating and stirring. The compounds were characterized by infrared absorption spectroscopy (IRFT), elemental analysis, thermal analysis (TG and DTA) and X-ray diffraction by the powder method. The absorptions observed in IR spectra are associated with N-H and O-H stretching, as well as symmetrical and asymmetric S-O stretching in the sulfonic group. The compounds present X-ray diffraction pattern with well-defined reflections, showing no evidence of isomorphism. The TG-DTA curves allowed to establish the stoichiometry of compounds as M(NH2SO3)2.xH2O, where M = Mn2+, Co2+, Ni2+, Cu2+ and Zn2+ and x ranging from 1 to 4. Dehydration leads to the formation of stable anhydrous. In all cases the respective sulfates are formed as an intermediate. After consecutive steps of decomposition, the respective oxides were obtained: Mn3O4, CoO, NiO, CuO and ZnO. The TG-DTA curves are characteristic for each sample, with thermal events related to dehydration and ligand decomposition.

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