Rate of Ligand Exchange with its Metal Complex by a Polarimetric Method
Abstract
OPTICALLY active 1,2-propylenediamine tetraacetic acid1 (H4PDTA) co-ordinates in a completely stereospecific manner2 with Co(III), Rh(III) and Cr(III). Courtauld models of either co-ordinated optical isomer show the methyl group to be sterically hindered for one configuration of the metal complex irrespective of whether the ligand is attached at 4 (non-planar), 5 or 6 points to the metal atom. The absolute stereospecificity of complex formation provides a simple polarimetric method of measuring the exchange-rate of the free ligand with its metal complexes.
- Publication:
-
Nature
- Pub Date:
- June 1960
- DOI:
- 10.1038/186966a0
- Bibcode:
- 1960Natur.186..966B