ChemInform Abstract: THE KINETICS OF HYDROLYSIS OF N-TRIMETHYLAMMONIOACETAMIDE AND OF SUBSTITUTED N-TRIMETHYLAMMONIOBENZAMIDES IN CONCENTRATED SULFURIC ACID

1980 ◽  
Vol 11 (19) ◽  
Author(s):  
M. LILER ◽  
D. G. MORRIS
Keyword(s):  
Sulfuric Acid ◽  
Kinetics Of Hydrolysis ◽  
Concentrated Sulfuric Acid ◽  
Kinetics Of ◽  
Hydrolysis Of

scholarly journals A study of the behaviour of some substituted 1,2,4-triazoline-3-thiones in different media

2000 ◽  
Vol 65 (9) ◽  
pp. 619-630
Author(s):  
Lucijana Arman-Zubic ◽  
Nada Perisic-Janjic ◽  
Marija Lazarevic
Keyword(s):  
Sulfuric Acid ◽  
Reaction Path ◽  
Dissociation Process ◽  
Consecutive Reaction ◽  
First Order ◽  
Kinetics Of Hydrolysis ◽  
Concentrated Sulfuric Acid ◽  
Sulfuric Acid Solutions ◽  
Kinetics Of ◽  
Hydrolysis Of

The acid-base behaviour of 4-phenyl-5-(4-R-benzyl)-1,2,4-triazoline-3-thione (1(R = OH); 2(R = OC2H5)) was studied in aqueous sulfuric acid and sodium hydroxide solutions. Three ionisation equilibria of compound 1 (pKBH3+ = -4.64, pKBH2 = 7.50, pKBH- = 10.06) and two ionisation equilibria of compound 2 (pKBH2+ = -4.82, pKBH = 7.45) were found. The first equilibrium belongs to the protonation of 1,2,4-triazoline-3-thione, while the second belongs to the dissociation of the same part of the molecule. The third equilibrium represents the dissociation process of the phenolic OH group of compound 1. The kinetics of hydrolysis of compounds 1 and 2 were studied in high concentrated sulfuric acid solutions. The hydrolysis follows an irreversible first-order consecutive reaction path.

Kinetics of hydrolysis of peroxodisulphate ions in acidic medium to peroxomonosulphuric acid

1981 ◽  
Vol 46 (5) ◽  
pp. 1229-1236 ◽  
Author(s):  
Jan Balej ◽  
Milada Thumová
Keyword(s):  
Ionic Strength ◽  
Rate Constants ◽  
Acidic Medium ◽  
Measured Data ◽  
Molar Ratios ◽  
Starting Solution ◽  
Kinetics Of Hydrolysis ◽  
Rate Of Hydrolysis ◽  
Kinetics Of ◽  
Hydrolysis Of

The rate of hydrolysis of S2O82- ions in acidic medium to peroxomonosulphuric acid was measured at 20 and 30 °C. The composition of the starting solution corresponded to the anolyte flowing out from an electrolyser for production of this acid or its ammonium salt at various degrees of conversion and starting molar ratios of sulphuric acid to ammonium sulphate. The measured data served to calculate the rate constants at both temperatures on the basis of the earlier proposed mechanism of the hydrolysis, and their dependence on the ionic strength was studied.

Kinetics of Hydrolysis of Some Bifunctional Schiff Bases

1990 ◽  
Vol 37 (5) ◽  
pp. 479-487 ◽  
Author(s):  
M.R. Mahmoud ◽  
A.M. El-Nady ◽  
F.A. Adam ◽  
M.A. El-Taher
Keyword(s):  
Schiff Bases ◽  
Kinetics Of Hydrolysis ◽  
Kinetics Of ◽  
Hydrolysis Of

scholarly journals Isothermal and non-isothermal kinetics of hydrolysis of 1-[2-(2- pentyloxyphenylcarbamoyloxy)-(2-methoxymethyl)-ethyl]- perhydroazepinium chloride (BK 129)

2013 ◽  
Vol 60 (2) ◽  
pp. 43-48
Author(s):  
Stankovičová M. ◽  
Bezáková Ž. ◽  
Beňo P. ◽  
Húšťavová P.
Keyword(s):  
Biological Activity ◽  
Alkaline Hydrolysis ◽  
Functional Group ◽  
Isothermal Kinetics ◽  
Basic Part ◽  
Buffer Solutions ◽  
Kinetics Of Hydrolysis ◽  
Short Time ◽  
Kinetics Of ◽  
Hydrolysis Of

Abstract The substance BK 129 - 1-[2-(2-pentyloxyphenylcarbamoyloxy)-(2-methoxymethyl)-ethyl]-perhydroazepinium chloride was prepared in terms of influence of the connecting chain between the carbamate functional group and the basic part of molecule on biological activity. Such a structural feature is important with regard to its stability. In this work we determined the rate constants of alkaline hydrolysis of this compound at increased temperature under isothermal and non-isothermal conditions. The hydrolysis was also performed in buffer solutions with the purpose of evaluating its stability. Non-isothermal tests of stability enable to reduce the number of analyses. The necessary data for stability of compound are in this way achieved in a short time.

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