Protonation thermodynamics of 1,10-phenanthroline in aqueous solution. Salt effects and weak complex formation

1996 ◽  
Vol 25 (6) ◽  
pp. 597-606 ◽  
Author(s):  
Alessandro De Robertis ◽  
Claudia Foti ◽  
Antonio Gianguzza ◽  
Carmelo Rigano
Keyword(s):  
Aqueous Solution ◽  
Complex Formation ◽  
Salt Effects

Protonation thermodynamics of 2,2'-bipyridyl in aqueous solution. Salt effects and weak complex formation

1993 ◽  
Vol 214 (2) ◽  
pp. 325-338 ◽  
Author(s):  
Concetta De Stefano ◽  
Antonio Gianguzza ◽  
Silvio Sammartano
Keyword(s):  
Aqueous Solution ◽  
Complex Formation ◽  
Salt Effects

Studies in polymerization XII. Salt effects on the polymerization of acrylonitrile in non-aqueous solution

1957 ◽  
Vol 241 (1226) ◽  
pp. 364-375 ◽  
Keyword(s):  
Aqueous Solution ◽  
Complex Formation ◽  
Anionic Polymerization ◽  
Transfer Reactions ◽  
Absolute Velocity ◽  
Lithium Salts ◽  
Salt Effects ◽  
Dimethylformamide Solution ◽  
Added Salt

A study of the polymerization of acrylonitrile in NN -dimethylformamide solution at 60°C in the presence of a number of lithium salts, including a determination of the absolute velocity coefficients, has been made. The coefficients for the propagation reaction and the transfer reactions to triethylamine and carbon tetrabromide are functions of the concentra­tion and nature of the added salt. The results are interpreted in terms of complex formation between polyacrylonitrile radicals and the ions of the salt which produces changes in the reactivity of the radicals. Complex formation with anions is found to decrease in the order Cl - > NO - 3 > ClO - 4 . The termination reaction is not significantly affected by the presence of salts. In certain circumstances an anionic polymerization of acrylonitrile, initiated by the salt, has been observed.

Salt effects on the protonation of ortho-phosphate between 10 and 50°C in aqueous solution. A complex formation model

1991 ◽  
Vol 20 (5) ◽  
pp. 495-515 ◽  
Author(s):  
Pier G. Daniele ◽  
Alessandro De Robertis ◽  
Concetta De Stefano ◽  
Antonio Gianguzza ◽  
Silvio Sammartano
Keyword(s):  
Aqueous Solution ◽  
Complex Formation ◽  
Formation Model ◽  
Salt Effects

Schiff base equilibria. II. Beryllium complexes of N-n-butylsalicylideneimine and the hydrolysis of the Be2+ ion

1965 ◽  
Vol 18 (5) ◽  
pp. 651 ◽  
Author(s):  
RW Green ◽  
PW Alexander
Keyword(s):  
Aqueous Solution ◽  
Schiff Base ◽  
Complex Formation ◽  
Distribution Coefficient ◽  
Dilute Aqueous Solution ◽  
The Stability ◽  
Ph Range ◽  
Hydrolysis Of ◽  
Beryllium Complexes ◽  
Equilibria In Aqueous Solution

The Schiff base, N-n-butylsalicylideneimine, extracts more than 99.8% beryllium into toluene from dilute aqueous solution. The distribution of beryllium has been studied in the pH range 5-13 and is discussed in terms of the several complex equilibria in aqueous solution. The stability constants of the complexes formed between beryllium and the Schiff base are log β1 11.1 and log β2 20.4, and the distribution coefficient of the bis complex is 550. Over most of the pH range, hydrolysis of the Be2+ ion competes with complex formation and provides a means of measuring the hydrolysis constants. They are for the reactions: Be(H2O)42+ ↔ 2H+ + Be(H2O)2(OH)2, log*β2 - 13.65; Be(H2O)42+ ↔ 3H+ + Be(H2O)(OH)3-, log*β3 -24.11.

Complex Formation in the Ternary System Tl(III)−CN-−Cl-in Aqueous Solution. A205Tl NMR Study

1996 ◽  
Vol 35 (24) ◽  
pp. 7074-7081 ◽  
Author(s):  
Katja E. Berg ◽  
Johan Blixt ◽  
Julius Glaser
Keyword(s):  
Aqueous Solution ◽  
Complex Formation ◽  
Ternary System ◽  
Nmr Study
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