ACIDIC AND BASIC DISSOCIATION CONSTANTS AND STRUCTURE

1955 ◽  
Vol 20 (6) ◽  
pp. 700-706 ◽  
Author(s):  
W. D. KUMLER
Keyword(s):  
Dissociation Constants ◽  
Basic Dissociation

Amines containing the CCl3 group and their basic dissociation constants

1958 ◽  
Vol 7 (7) ◽  
pp. 819-822
Author(s):  
A. N. Nesmeianov ◽  
L. I. Zakharkin ◽  
R. Kh. Freidlina
Keyword(s):  
Dissociation Constants ◽  
Ccl3 Group ◽  
Basic Dissociation

The Basic Dissociation Constants of Some Aliphatic Hydroxyamines1

1947 ◽  
Vol 69 (5) ◽  
pp. 1213-1214 ◽  
Author(s):  
Samuel Glasstone ◽  
Alfred F. Schram
Keyword(s):  
Dissociation Constants ◽  
Basic Dissociation

scholarly journals INVESTIGATION OF COORDINATION PROPERTIES OF 5,10,15,20-TETRA(4-OH-PHENYL) PORPHYRIN IN ACETONITRILE AND DIMETHYLFORMAMIDE

2017 ◽  
Vol 60 (6) ◽  
pp. 65
Author(s):  
Anna O. Plotnikova ◽  
Yulia B. Ivanova ◽  
Nugzar Zh. Mamardashvili
Keyword(s):  
Zinc Complex ◽  
Dissociation Constants ◽  
Spectrophotometric Titration ◽  
Free Medium ◽  
Kinetic Rate ◽  
Coordination Properties ◽  
Kinetics Of ◽  
Basic Dissociation ◽  
Ionic Forms ◽  
Influence Of Solvent

In the present work the reactions of basic interaction of 5,10,15,20-tetra(4-OH-phenyl) porphyrin in acetonitrile with the perchloric acid are studied by the method of spectrophotometric titration. And the chemical kinetics of ligand with zinc acetate in the dimethylformamide was carried out. The constant of the basic dissociation of the protonated acids of 5,10,15,20-tetra(4-OH-phenyl) porphyrin and kinetic parameters of the reaction of the formation of the zinc complex was obtained. The comparative analysis of our own obtained data and literature data according to the basic and coordination properties of 5,10,15,20-tetra(4-OH-phenyl) porphyrin and 5,10,15,20-tetrapheny porphyrin in acetonitrile and dimetilforamide in the range of 298-333K was carried out, which made it possible to draw a number of the interesting conclusions, which are concerned with the stabilization of the ionic forms of ligand in the acetonitrile and the dimethylformamide and the influence of solvent on the depth of the protonation of ligand and the kinetic rate of the formation of the corresponding zinc complexes. It is shown that the stabilization of the ionic forms of ligand upon transfer from the acetonitrile to dimethylformamide reduces the depth of the protonation of ligand, which is reflected in the decrease of the values of the dissociation constants of the cation forms of porphyrin, and the kinetic rate and the corresponding power expenditures for the reaction of the formation of ZnT(4-OH-Ph)P. It is shown that reactivity of ligand in the dipolar proton-free medium can be regulated by a change in the properties of this medium, which makes it possible to forecast the processes of the synthesis of compounds with the assigned properties.Forcitation:Plotnikova A.O., Ivanova Yu.B., Mamardashvili N.Zh. Investigation of coordination properties of 5,10,15,20-tetra(4-OH-phenyl) porphyrin in acetonitrile and dimethylformamide. Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol. 2017. V. 60. N 6. P. 65-71.

scholarly journals THE SOLUBILITIES, APPARENT DISSOCIATION CONSTANTS, AND THERMODYNAMIC DATA OF THE DIHALOGENATED TYROSINE COMPOUNDS

1935 ◽  
Vol 18 (6) ◽  
pp. 889-903 ◽  
Author(s):  
Philip S. Winnek ◽  
Carl L. A. Schmidt
Keyword(s):  
Dissociation Constant ◽  
Thermodynamic Data ◽  
Dissociation Constants ◽  
Heats Of Solution ◽  
Basic Dissociation

1. The solubilities and differential heats of solution of d-tyrosine, dl-tyrosine, diiodo-dl-tyrosine, dibromo-l-tyrosine (hydrated), dibromo-l-tyrosine (anhydrous), and dichloro-l-tyrosine (hydrated) have been determined. 2. Evidence has been advanced that dl-tyrosine is a compound. 3. From the solubility determinations at various acidities, the apparent acid and basic dissociation constants of dibromo-l-tyrosine and dichloro-l-tyrosine have been determined at 25° and 40°C. From these data the apparent heats of ionization have been calculated. 4. The question concerning which of the groups in l-tyrosine and its dihalogenated substitution products is responsible for each dissociation constant has been discussed.

The Dissociation Constants and Conductivities of Mono-, Di- and Triethylamine in Aqueous Solution

1973 ◽  
Vol 51 (4) ◽  
pp. 551-555 ◽  
Author(s):  
Alan Newton Campbell ◽  
Sing-Yeung Lam
Keyword(s):  
Aqueous Solution ◽  
Dissociation Constants ◽  
Aliphatic Amines ◽  
Hydrolysis Of ◽  
Basic Dissociation ◽  
Basic Strength

The conductances of the mono-, di-, and triethylamines, and their hydrochlorides, in aqueous solution, have been determined. Corrections for the formation of amine carbonates and hydrolysis of the halides were made. By using the Kohlrausch law and the method of Shedlovsky and Kay, basic dissociation constants for the amines have been computed. The basic strength of this series has been found to conform to the usual trend for other series of aliphatic amines.

Basic Dissociation Constants of Some Substituted Flavones1

1954 ◽  
Vol 76 (13) ◽  
pp. 3507-3511 ◽  
Author(s):  
Charlotte T. Davis ◽  
T. A. Geissman
Keyword(s):  
Dissociation Constants ◽  
Basic Dissociation
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