Cyclohexanediaminetetraacetic acid CDTA

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... 

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. 

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