| Abstrakt: |
The viscosities of aqueous solutions containing metal chelate formed with trans-1,2-cyclohexanediaminetetraacetic acid (H4cydta) were measured with a Cannon-Fenske capillary viscometer. Measurements were made in a Shibata viscosity bath maintained at 25±0.01°C. The Jones-Dole viscosity B-coefficient of the cydta4−chelates is larger than that of the corresponding ethylenediaminetetraacetato (edta4−) chelates, as may be expected. The B-value of the Co (III) chelate [Co cydta]−is much smaller than that of any of the divalent metal cydta4−chelates studied. This fact, the same as in the case of the edta4−chelates, may indicate that the Co (III) chelate has a marked stable hexa-coordinated structure, while divalent metal chelates do not have such a stable hexa-coordinated structure as the Co (III) chelate. |
