ISSN:
0749-1581
Keywords:
13C NMR
;
Tl (III) complexes of EDTA, DTPA, NTA
;
205Tl, 13C coupling constants
;
Coordination chemical shifts
;
Chemistry
;
Analytical Chemistry and Spectroscopy
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
The 13C NMR characteristics of the polyaminocarboxylate ligands EDTA [(HO2CCH2)2NCH2CH2N(CH2CO2H)2],DTPA (HO2CCH2)2NCH2CH2N(CH2CO2H)CH2CH2N(CH2CO2H)2 and NTA [N(CH2CO2H)3] and their Tl(III) complexes are reported. The pH dependence of the 13C shifts of the ligands is helpful in understanding the 13C coordination chemical shifts, Δδ, but not the thallium-carbon coupling constants J(205TI, 13C), which vary markedly for no apparent reason. The anion Tl(DTPA-5H)2- contains three non-equivalent coordinated carboxyl functions and a suggestion is made to account for this lower symmetry.
Additional Material:
1 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/mrc.1260250120
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