The reactions of diethylenetriaminepentaacetic acid (DTPA=H(5)L) or chromium(III)-DTPA, a 'chelating agent', with oxovanadium(IV) were investigated in aqueous solution by potentiometric methods. Homo- and hetero-binuclear species were evidenced as well as mixed complexes with hydrogen or hydroxide ions. The stability constants for these equilibria were calculated in 1.0 mol l(-1) NaClO4 solution at 20 degrees C. The mononuclear (VO)H(3)L . H2O and the heterobinuclear (VO)CrL . 5H(2)O complexes were also obtained as solid compounds and were characterized by IR spectroscopy and thermoanalytical techniques (TG and DSC).
Binuclear chelates of diethylenetriaminepentaacetic acid with chromium(III) and oxovanadium(IV) ions / A., Napoli; Bucci, Remo; Magri', Antonio; Magri', Andrea. - In: JOURNAL OF THERMAL ANALYSIS. - ISSN 0368-4466. - STAMPA. - 46:6(1996), pp. 1865-1873. [10.1007/bf01980789]
Binuclear chelates of diethylenetriaminepentaacetic acid with chromium(III) and oxovanadium(IV) ions
BUCCI, Remo;MAGRI', Antonio;MAGRI', Andrea
1996
Abstract
The reactions of diethylenetriaminepentaacetic acid (DTPA=H(5)L) or chromium(III)-DTPA, a 'chelating agent', with oxovanadium(IV) were investigated in aqueous solution by potentiometric methods. Homo- and hetero-binuclear species were evidenced as well as mixed complexes with hydrogen or hydroxide ions. The stability constants for these equilibria were calculated in 1.0 mol l(-1) NaClO4 solution at 20 degrees C. The mononuclear (VO)H(3)L . H2O and the heterobinuclear (VO)CrL . 5H(2)O complexes were also obtained as solid compounds and were characterized by IR spectroscopy and thermoanalytical techniques (TG and DSC).I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
