Kinetics and mechanism of diazo coupling. VIII. The coupling kinetics of substituted benzenediazonium salts with aminohydroxynaphthalene sulfonic acids

1969 ◽  
Vol 34 (10) ◽  
pp. 2971-2981 ◽  
Author(s):  
J. Panchartek ◽  
V. Štěrba
Keyword(s):  
Kinetics And Mechanism ◽  
Sulfonic Acids ◽  
Diazo Coupling ◽  
Kinetics Of

Kinetics and mechanism of the reaction of iron(III) with 6-methyl-2,4-heptanedione and 3,5-heptanedione

1990 ◽  
Vol 55 (8) ◽  
pp. 1984-1990 ◽  
Author(s):  
José M. Hernando ◽  
Olimpio Montero ◽  
Carlos Blanco
Keyword(s):  
Aqueous Solution ◽  
Metal Ion ◽  
Activation Parameters ◽  
Enol Form ◽  
Kinetics And Mechanism ◽  
Kinetic Constants ◽  
Steric Factors ◽  
Kinetics Of ◽  
Mechanism Of The Reaction

The kinetics of the reactions of iron(III) with 6-methyl-2,4-heptanedione and 3,5-heptanedione to form the corresponding monocomplexes have been studied spectrophotometrically in the range 5 °C to 16 °C at I 25 mol l-1 in aqueous solution. In the proposed mechanism for the two complexes, the enol form reacts with the metal ion by parallel acid-independent and inverse-acid paths. The kinetic constants for both pathways have been calculated at five temperatures. Activation parameters have also been calculated. The results are consistent with an associative activation for Fe(H2O)63+ and dissociative activation for Fe(H2O)5(OH)2+. The differences in the results for the complexes of heptanediones studied are interpreted in terms of steric factors.

Kinetics of the diazo coupling between 1-naphthol and diazotized sulfanilic acid

1990 ◽  
Vol 29 (9) ◽  
pp. 1761-1765 ◽  
Author(s):  
John R. Bourne ◽  
Oemer M. Kut ◽  
Joachim Lenzner ◽  
Horst Maire
Keyword(s):  
Sulfanilic Acid ◽  
Diazo Coupling ◽  
Kinetics Of
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