Cyclohexanediaminetetraacetic acid

Citrate, cyclohexanediaminetetraacetic acid, V,V-dihydroxyethylglycine, EDTA, E , SO , tartrate... 

Complexes of IrIV with iminodiacetic acid (HN(CH2COOH)2), nitrilotriacetic acid (N(CH2COOH)3), and trara,s-l,2-cyclohexanediaminetetraacetic acid (L) have been studied by spectroscopic methods.43... 

Iliuta, M.C. and Larachi, F. Solubility of dimethyldisulfide (DMDS) in aqueons solntions of Fe(HI) complexes of trans-1,2-cyclohexanediaminetetraacetic acid (CDTA) using the static headspace method. Fluid Phase Equlllb., 233(2) 184-189,2005. 

Frant and Ross [108] recommended sample adjustment using TISAB buffer ( Total Ionic Strength Adjustment Buffer ), obtained by dissolving 57ml glacial acetic acid, 58 g NaCl and 4g 1,2-cyclohexanediaminetetraacetic acid (CDTA), adjustment of the solution pH with sodium hydroxide to 5 to 5.5 and dilution to 1 litre, all to maintain a constant ionic strength and pH between 5 and 5.5 and to complex ions such as Al or Fe that interfere in the determination. A detailed... 

H4cdta /rfl/i5-l, 2-cyclohexanediaminetetraacetic acid /rfl 5-(cyclohexane-1,2-diyldinitrilo)tetraacetic acid... 

Chelating agents edta ethylenediaminetetraacetic acid, edtaoh = hydroxyethylethylenediaminetriaceticacid, cydta = cyclohexanediaminetetraacetic acid, hdtpa = protonated diethylenetriaminepentaacetic acid, [Co(III)(en)2(PVP)Cl]Cl x ethyl 0.45, DP of PVP 98. 

Similarly (— )-trans-1,2-cyclohexanediaminetetraacetic acid (CDTA) also coordinates stereospecifically (25). In diaminocyclohexane, both amino groups must be equatorial (Fig. 8) since with the donor groups in the axial positions the ligand cannot function as a bidentate and trans- 1,2-cyclo-hexanediaminetetraacetic acid could not coordinate as a sexadentate. If the cyclohexane ring adopts the boat conformation ( 5 kcal/mole less stable than the chair conformer), the l structure (Fig. 8) is still the only one possible, as the ligand now will not coordinate at all six positions in the d configuration. 

Chelators that were not at all effective in rodent studies include monosodium glutamate, Tiron (4,5-dihydroxy-1,3-benzene-disulfonic acid), DMSA (2,3-dimercaptosuccinic acid), succinic acid, malic acid, CaNa2CTDA (cyclohexanediaminetetraacetic acid), and THPC, a cyclic derivative of EDTA (Kostial et al. 1979 Llobet et al. 1992b Ortega et al. 1989). 

The interaction of aspartic acid and other ligands with complexes of Tb " with edta and related ligands has also been studied and association constants determined. The complex formation between Tb " or Eu " and (r)-( — )-l,2-propanediaminetetraacetic add or (r,r)-trons-1,2-cyclohexanediaminetetraacetic acid has been similarly investigated. The pH dependence of the circularly polarized and total luminescence shows a drastic configurational change of the chelate system at pH 10.5-11, corresponding, it is believed, to formation of hydroxide complexes. Tlie technique of magnetic-field-induced circularly polarized emission has been introduced for lanthanide ions the mechanisms of lanthanide transition intensities are also discussed in the paper. 

Cyclohexanediaminetetraacetic acid 1,2-Cyclohexanediamine-N,N,N, N -tetraacetic acid Cyclohex-1,2-ylenediaminetetra (acetic acid) trans-1,2-Cyclohexylenediaminetetraacetic acid (1,2-Cyclohexylenedinitrilo) tetraacetic acid CyDTA 1,2-... 

Cyclohexanediaminetetraacetic acid 1,2-Cyclohexanediamine-N,N,N, N-tetraacetic acid. See Cyclohexanediamine tetraacetic acid... 

Propylenediaminetetraacetic acid Trimethylenediaminetetraacetic acid Nitrilotriacetic acid Dihydroxyethylglycine trflns-l,2-Cyclohexanediaminetetraacetic acid Tetramethylenediaminetetraacetic acid, Pentamethylenediaminetetraacetic acid Hexamethylenediaminetetraacetic acid Octamethylenediaminetetraacetic acid... 

The h.f.t, as well as other physicochemical methods was used for the determination of the composition and, in some cases, the structure of complex compounds of Th(IV) (7-9), In(III) and several rare earths ions primarily for using its properties for the development of new analytical procedures (4-6), Fig. 1 shows the h. f.t, curves for the titration of 2,10" M thorium chloride solutions with di-Na salts of EDTA and cyclohexanediaminetetraacetic acids. The molar ratio of Th(IV) to the complexon for stable compounds is equal to 1 1, which is in agreement with data obtained by other methods. 

Figure 5. Transport of Cu "" Through a Toluene Supported Liquid Membrane in the Presence and Absence of Laurate. The carrier was 0.1 M 1,10-didecyl-l,10-diaza-18-crown-6. The source phase was 5 x 10 M Cu " in 1 x 10 M V-morpholinoethanesulphonic acid-LiOH buffer (pH 6). The receiving phase was 5 X 10 M cyclohexanediaminetetraacetic acid. Circles represent transport with 0.1 M laurate in the membrane. Triangles indicate transport without laurate. (Reproduced with permission from ref. 35. Copyright 1994 Elsevier Science B.V.)...

The transport of substances between the inside and outside of red cells can be monitored using NMR if the resonances from the two environments have different chemical shifts or intensities. Also, resonances outside the cell can be selectively broadened by the addition of paramagnetic species that do not cross the red cell membrane. Those used include the ferric complex of desferrioxamine, dysprosium-DTPA and the copper-cyclohexanediaminetetraacetic acid complex. To measure the rate of influx of a compound into red cells, the compound is added with the paramagnetic agent to a red cell suspension and the intensity of the resonance from the intracellular component is monitored as a function of time. This approach has been used to study the transport of glycerol, alanine lactate, choline and glycylglycine. The time scale that can be addressed covers the range of ms to hours. 

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