ChemInform Abstract: METAL ION-CATALYZED OXIDATION OF STEROIDS. XV. OXY-FUNCTIONALIZATION OF ADAMANTANE-1-ACETIC ACID AND ADAMANTANE-1-CARBOXYLIC ACID BY THE FERROUS IRON-MOLECULAR OXYGEN SYSTEM IN AQUEOUS SOLUTION

1982 ◽  
Vol 13 (28) ◽  
Author(s):  
T. MIURA ◽  
K. SHIBATA ◽  
T. SAWAYA ◽  
M. KIMURA
Keyword(s):  
Aqueous Solution ◽  
Acetic Acid ◽  
Carboxylic Acid ◽  
Molecular Oxygen ◽  
Ferrous Iron ◽  
Metal Ion ◽  
Oxygen System ◽  
Catalyzed Oxidation

scholarly journals Metal Ion Catalized Oxidation of Steroids. I. 15α-Hydroxylation of Deoxycholic Acid in Aqueous Solution by Ferrous Ion-Molecular Oxygen System

1972 ◽  
Vol 20 (9) ◽  
pp. 1883-1889 ◽  
Author(s):  
MICHIYA KIMURA ◽  
MEIJI KAWATA ◽  
MASAHIKO TOHMA ◽  
AKIHARU FUJINO ◽  
KATSUHIKO YAMAZAKI ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Molecular Oxygen ◽  
Metal Ion ◽  
Deoxycholic Acid ◽  
Ferrous Ion ◽  
Oxygen System

Pattern Formation in the Methylene Blue-Fructose-Oxygen System in Aqueous Solution and in Gel Systems

2000 ◽  
Vol 65 (9) ◽  
pp. 1394-1402 ◽  
Author(s):  
Ľubica Adamčíková ◽  
Mária Hupková ◽  
Peter Ševčík
Keyword(s):  
Aqueous Solution ◽  
Methylene Blue ◽  
Pattern Formation ◽  
Alkaline Ph ◽  
Initial Reactant ◽  
Nonlinear Reaction ◽  
Oxygen System ◽  
Hydrodynamic Processes ◽  
Liquid Layer Thickness ◽  
Catalyzed Oxidation

Spatial patterns in methylene blue-catalyzed oxidation of fructose at alkaline pH were found in aqueous solution and in gel systems. In a thin liquid layer (thickness >2.4 mm) a mixture of spots and stripes was formed by interaction of a nonlinear reaction and the Rayleigh or Maragoni instabilities. The pattern formation was affected by initial reactant concentrations and by the thickness of the reaction mixture layer. Long-lasting structures were formed in gel systems (polyacrylamide, agar, gelatin). These patterns also arise primarily from hydrodynamic processes.

Metal ion catalysis of the decomposition of transient 2-carboxy-2,5-cyclohexadienones in aqueous solution

1988 ◽  
Vol 66 (5) ◽  
pp. 1194-1198 ◽  
Author(s):  
Oswald S. Tee ◽  
N. Rani Iyengar
Keyword(s):  
Aqueous Solution ◽  
Carboxylic Acid ◽  
Metal Ion ◽  
Hydrogen Ion ◽  
Ion Binding ◽  
Metal Ion Binding ◽  
Ferric Ions ◽  
Bromide Ion ◽  
Metal Ion Catalysis ◽  
The Stability

Bromide ion induced debromination of the anion of 4-bromo-4-methyl-2,5-cyclohexadienone-2-carboxylic acid (1) is catalyzed by cupric ions and ferric ions. Similarly, the enolization of the anion of the benzocyclohexadienone 3, which is formed during the bromination of 1-naphthol-2-carboxylic acid, is catalyzed by some metal ions. The origin of the catalysis in these reactions is strong metal ion binding to the incipient dianion products that are of the salicylate type. Evidence for this is that the efficiency of the metal (and hydrogen) ion catalysis parallels the stability of the analogous complexes with the salicylate dianion.

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