Propylenediaminetetraacetate complexes

Im and Busch, using the optical activity method, have also made a study of the exchange of the propylenediaminetetraacetate complexes of Co(III) and Co(II) (CoPY and CoPY ). This system can be treated by the McKay equation. Optical rotation data was obtained at temperatures between 80 and 100°C and various pH s between 2.0 and 7.0. This was again found to be consistent with exchange via two pathways k and k )... 

Group 5 Systems. 51V NMR spectroscopy was used to follow the a-cis to (3-cA isomerisation of the Vv- propylenediaminetetraacetate complex.1036 The presence of isomerisation equilibria for (220) was studied by 3H, 13C and 51V NMR spectroscopy in solution,1037 51V solution NMR spectra were used to determine the species present in the systems II+/II2V04 /I I202/L-(+)-lactate or picolinate.1038,1039... 

Inamoto A, Ogasawara K, Omata K, Kabuto K, Sasaki Y. Samarium(lll) propylenediaminetetraacetate complex a water-soluble chiral shift reagent for use in high-field NMR. Org. Leu. 2000 2 3543-3545. 

As in the case of the Mo u-edta complex the edta ligand in [Mo204(edta)]2 is coordinated to the binuclear core in a basket like conformation. Studies on complexes of Mo204+ having optically active amine-carboxylate ligands such as propylenediaminetetraacetate have been reported.121... 

Much larger differentiations between enantiomers may be brought about with lanthanide shift reagents such as tris[3-((heptafluoropropyl) hydroxymethylene)-rf-camphorato]europium, [Eu(hfc)3] (3.14) [10], or Samarium(ni)-(/f) or (5)-propylenediaminetetraacetate, Sm-pdta (3.15) [11]. These paramagnetic complexes associate with polar sites in molecules... 

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