Determination of stability constants of metal complexes from NMR chemical shifts and relaxation rates using a spreadsheet computer program | Zendy

Huskens Jurriaan | Zendy; Lammers Hendrik | Zendy; van Bekkum Herman | Zendy; Peters Joop A. | Zendy

Premium

Determination of stability constants of metal complexes from NMR chemical shifts and relaxation rates using a spreadsheet computer program

Author(s) -

Huskens Jurriaan,

Lammers Hendrik,

van Bekkum Herman,

Peters Joop A.

Publication year - 1994

Publication title -

magnetic resonance in chemistry

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.483

H-Index - 72

eISSN - 1097-458X

pISSN - 0749-1581

DOI - 10.1002/mrc.1260321109

Subject(s) - chemistry , potentiometric titration , relaxation (psychology) , metal , nuclear magnetic resonance spectroscopy , lanthanide , stability constants of complexes , electroanalytical method , nmr spectra database , analytical chemistry (journal) , spectral line , stereochemistry , chromatography , organic chemistry , aqueous solution , ion , psychology , social psychology , physics , electrode , astronomy

The versatility of multinuclear magnetic resonance techniques in the determination of stability constants of metal complexes is demonstrated for three cases in which potentiometry is impossible or less suitable. The complexation of cyclo‐trimetaphosphate to lanthanide aminopolycarboxylate complexes was investigated in a dilution experiment using 31 P NMR shifts. The stabilities of CdL and CdL 2 [L = 1‐(2‐aminoethylamino)‐1‐deoxy‐ D ‐galactitol] were determined by 113 Cd NMR speciation, in which the occurring species were in slow exchange. Competition experiments using both 31 P NMR shifts and 13 C and 31 P relaxation rate enhancements were performed to determine the stabilities of Nd(NTA)(PPP) and Nd(PPP) 2 (PPP = tripolyphosphate). Where possible, the results were compared with potentiometric data and found to be in good agreement.

This content is not available in your region!

Continue researching here.

Having issues? You can contact us here

Accelerating Research