potassium-cyanate and isocyanic-acid

potassium-cyanate has been researched along with isocyanic-acid* in 1 studies

Other Studies

1 other study(ies) available for potassium-cyanate and isocyanic-acid

Article	Year
Cyanate as an Active Precursor of Ethyl Carbamate Formation in Sugar Cane Spirit. Journal of agricultural and food chemistry, 2015, Aug-26, Volume: 63, Issue:33 The thermodynamic and kinetic aspects of ethyl carbamate (EC) formation through the reaction between cyanate and ethanol were investigated. The rate constant values for cyanate ion decay and EC formation are (8.0 ± 0.4) × 10(-5) and (8.9 ± 0.4) × 10(-5) s(-1), respectively, at 25 °C in 48% aqueous ethanolic solution at pH 4.5. Under the investigated experimental conditions, the rate constants are independent of the ethanol and cyanate concentrations but increase as the temperature increases (ΔH1(⧧) = 19.4 ± 1 kcal/mol, ΔS1(⧧) = −12.1 ± 1 cal/K, and ΔG1(⧧) = 23.0 ± 1 kcal/mol) and decrease as the solution pH increases. According to molecular modeling (DFT) that was performed to analyze the reaction mechanism, the isocyanic acid (HNCO) is the active EC precursor. The calculated ΔG1(⧧), ΔH1(⧧), and ΔS1(⧧) values are in very good agreement with the experimental ones. Topics: Alcoholic Beverages; Cyanates; Ethanol; Hydrogen-Ion Concentration; Kinetics; Saccharum; Thermodynamics; Urethane	2015

Article

Year

Cyanate as an Active Precursor of Ethyl Carbamate Formation in Sugar Cane Spirit.

Journal of agricultural and food chemistry, 2015, Aug-26, Volume: 63, Issue:33

The thermodynamic and kinetic aspects of ethyl carbamate (EC) formation through the reaction between cyanate and ethanol were investigated. The rate constant values for cyanate ion decay and EC formation are (8.0 ± 0.4) × 10(-5) and (8.9 ± 0.4) × 10(-5) s(-1), respectively, at 25 °C in 48% aqueous ethanolic solution at pH 4.5. Under the investigated experimental conditions, the rate constants are independent of the ethanol and cyanate concentrations but increase as the temperature increases (ΔH1(⧧) = 19.4 ± 1 kcal/mol, ΔS1(⧧) = −12.1 ± 1 cal/K, and ΔG1(⧧) = 23.0 ± 1 kcal/mol) and decrease as the solution pH increases. According to molecular modeling (DFT) that was performed to analyze the reaction mechanism, the isocyanic acid (HNCO) is the active EC precursor. The calculated ΔG1(⧧), ΔH1(⧧), and ΔS1(⧧) values are in very good agreement with the experimental ones.

Topics: Alcoholic Beverages; Cyanates; Ethanol; Hydrogen-Ion Concentration; Kinetics; Saccharum; Thermodynamics; Urethane

2015