Diaminocyclohexanetetra-acetic acid

Schwarzenbach (1945) has developed the use of such chelating agents as nitrilotriacetic acid (a), ethylenediaminetetra-acetic acid (b) and 1 2 diaminocyclohexanetetra-acetic acid (c). 

Standard vanadium solution I mg/ml. Preparation as in Section 55.2.1. 1,2-Diaminocyclohexanetetra-acetic acid (DCTA) 0.1 M solution. Ammonium acetate 2 M solution, adjusted with acetie acid to pH 5.5. 

Aminopolycarboxylic acids (ethylenediaminetetra-acetic acid (EDTA), 1,2-diaminocyclohexanetetra-acetic acid, bis-(aminoethyl)glycolether-N,N,N, N -tetraaceticacid, diethylenetriaminepentaacetic acid and nitroacetic acid) can be quantified through their inhibitory effects on metal-catalyzed reactions, whether by kinetic methods (at concentrations between 10 and 10 mol 1 or by direct catalytic titration... 

Acetic acid, tr nj-l,2-cyclohexylenediiminotetra-metal complexes, 2,786 Acetic add, 1,2-diaminocyclohexanetetra-alkaline earth metal complexes, 3,32 Acetic add, ethylenebis[(carboxymethyl)unino-ethyleneiminojtetra-metal complexes equilibrium data, 2,788 stability, 2,787... 

The measurement of stability constants of complexes of yttrium, lanthanide, and actinide ions with oxalate, citrate, edta, and 1,2-diaminocyclohexanetetra-acetate ligands has revealed that there is a slight increase in the stability of complexes of the /-electron elements, relative to the others. A series of citric acid (H cit) complexes of the lanthanides have been investigated by ion-exchange methods and the species [Ln(H2cit)]", [Ln(H2cit)2] , [Ln-(Hcit)], and [Ln(Hcit))2] were detected. Simple and mixed complexes of dl- and jeso-tartaric acid have been obtained with La " and Nd ions, and the stability constants of lactate, pyruvate, and x-alaninate complexes of Eu and Am " in water have been determined. 

---