LXVI.—The action of hydrogen sulphide on the alkyloxides of the metals. Part I. Sodium and potassium ethoxides

Rule, Alexander

doi:10.1039/ct9119900558

Cited by 18 publications

(3 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Na2S2, K2S3, Na2S4, and K2S5 were synthesized and analyzed by the methods described in a previous paper (ref 16 and references therein). Na2S4 samples with different isotope composition for isotope dilution experiments were synthesized as follows: First, NaHS was synthesized by a reported procedure (36) from precursors with natural isotopic composition. Afterward, a stoichiometric amount of natural sulfur of high 34 S content sulfur was added to the buffered solution of NaHS to obtain 34 S-rich starting solution.…”

Section: Methodsmentioning

confidence: 99%

Equilibrium Distribution of Polysulfide Ions in Aqueous Solutions at 25 °C: A New Approach for the Study of Polysulfides' Equilibria

Kamyshny

Goifman

Gun

et al. 2004

Environ. Sci. Technol.

198

194

View full text Add to dashboard Cite

A new approach based on rapid, chemical derivatization in a single phase was used to determine the disproportionation constants and the underlying thermodynamics of inorganic polysulfides in aqueous solutions. This method resolves the dispute over the existence of hexasulfide in aqueous solutions and establishes the presence of even higher polysulfide chains in water. The Gibbs free energies of formation (G(Sn)(o)2-) for the polysulfide species are 77.4, 71.6, 67.4, 66.1, 67.2, 70.5, and 73.6 kJ/mol for n = 2-8, respectively. Our approach is based on single phase, fast methylation of polysulfides with methyl trifluoromethanesulfonate (methyl triflate) and subsequent determination of the dimethylpolysulfides by HPLC. Two independent methods were used in order to confirm quantitative equivalence between the observed distribution of dimethylpolysulfides and the polysulfide distribution in the water: (i) Kinetic studies of each competing reaction step showed that the kinetics of the derivatization are faster than each of the competing reactions that may lead to disproportionation and deviation of the observed distribution of dimethylpolysulfides from that of the aqueous polysulfides. (ii) Determination of isotope mixing during the derivatization of a mixture of two solutions, one containing polysulfide of natural isotopic distribution and the second containing 34S-rich polysulfide revealed that polysulfide mixing during derivatization is rather low. The systematic error due to redistribution of pentasulfide during derivatization is 3% based on isotope dilution tests and less than 5% of total zero-valent sulfur based on kinetic considerations.

show abstract

Section: Methodsmentioning

confidence: 99%

Equilibrium Distribution of Polysulfide Ions in Aqueous Solutions at 25 °C: A New Approach for the Study of Polysulfides' Equilibria

Kamyshny

Goifman

Gun

et al. 2004

Environ. Sci. Technol.

198

194

View full text Add to dashboard Cite

show abstract

“…Materials, (a) Rhombic sulfur (Alfa Inorganics) was 99.999% pure, (b) Monomethylamine (Matheson) was 98.0% pure and was used without further purification, (c) Ethylenediamine (EDA) and n-propylamine (both from Matheson Coleman and Bell) were distilled under atmospheric conditions and then under vacuum prior to being used, (d) NaHS necessary for the synthesis of Na2S4 was prepared by the reaction of hydrogen sulfide (Matheson, 99.5%) and sodium ethoxide in benzene. 4 The NaHS was dried in vacuo at approximately 110°for 8 hr. (e) Na2$4 was prepared by the reaction of NaHS and Sg in liquid ammonia under vacuum.…”

Section: Methodsmentioning

confidence: 99%

Raman spectra of sodium tetrasulfide in primary amines. Evidence for sulfide (S42- and S8n-) ions in rhombic sulfur-amine solutions

Daly¹,

Brown²

1975

J. Phys. Chem.

View full text Add to dashboard Cite

Raman spectra of rhombic sulfur dissolved in ethylenediamine, n-propylamine, and monomethylamine have been reported previously. Bands due to new species were observed at 400,440,462,510, and 535 cm-l. Bands at 535 cm-l in the Raman spectra and a t 585 cm-l in the infrared spectra were assigned to the symmetric and antisymmetric stretching vibrations of S3-, respectively. The bands previously reported at 400, 440, and 510 cm-l are now assigned to the polysulfides, S42-and Ssn-. In addition, the Raman spectrum of solid Na2S4 is reported for the firsf time.

show abstract

“…Even sodium alkyls are reported valuable for preparing salts of alkylated acetonitriles (186), and aluminum alkoxides for manufacturing aluminum carboxylates (187). Exceptionally pure salts of inorganic acids are similarly accessible; hydrogen sulfide (317,197,312) and hydrogen selenide (387, 21) form hydrosulfides and hydroselenides of alkali metals, H2S + NaOC2H6 -* NaSH + C2H6OH…”

Section: Ch3cooc2h6 + 2naohmentioning

confidence: 99%

Metallic Salts of Alcohols and Alcohol Analogs.

Dermer¹

1934

Chem. Rev.

View full text Add to dashboard Cite

LXVI.—The action of hydrogen sulphide on the alkyloxides of the metals. Part I. Sodium and potassium ethoxides

Cited by 18 publications

References 0 publications

Equilibrium Distribution of Polysulfide Ions in Aqueous Solutions at 25 °C: A New Approach for the Study of Polysulfides' Equilibria

Equilibrium Distribution of Polysulfide Ions in Aqueous Solutions at 25 °C: A New Approach for the Study of Polysulfides' Equilibria

Raman spectra of sodium tetrasulfide in primary amines. Evidence for sulfide (S42- and S8n-) ions in rhombic sulfur-amine solutions

Metallic Salts of Alcohols and Alcohol Analogs.

Contact Info

Product

Resources

About