1973 Volume 46 Issue 1 Pages 157-159
The viscosities of aqueous solutions containing a metal chelate formed with iminodiacetic acid (H2ida) or N-methyliminodiacetic acid (H2mida) were measured with Cannon-Fenske capillary viscometers. Measurements were made in a Shibata viscosity bath maintained at 25±0.01°C. The Jones-Dole viscosity B-coefficient of each bis-ida chelate is lower than that of the corresponding bis-mida chelate, as may be expected. The B-coefficients for the mono-ida and mono-mida chelates were not determined accurately and will not be reported here. The B-value of cisN-[Co(ida)2]− is higher than that of the trans-isomer. This is probably associated with the fact that the cis-isomer interacts with the solvent more strongly than the trans-isomer.
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