VANADIUM(III) COMPLEXES IN AQUEOUS SOLUTION WITH THE DICARBOXYLIC OXALIC, MALONIC AND SUCCINIC ACIDS
The complex species formed in aqueous solution (25 °C, I = 3.0 mol.dm-3 KCl ionic medium) between V3+ cation and the dicarboxylic acids oxalic, malonic and succinic (H2L) have been studied potentiometrically. The application of the least-squares computer program LETAGROP to the experimental (emf H)...
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| Autores principales: | , , , |
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| Lenguaje: | English |
| Publicado: |
Sociedad Chilena de Química
2004
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| Materias: | |
| Acceso en línea: | http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072004000400003 |
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| Sumario: | The complex species formed in aqueous solution (25 °C, I = 3.0 mol.dm-3 KCl ionic medium) between V3+ cation and the dicarboxylic acids oxalic, malonic and succinic (H2L) have been studied potentiometrically. The application of the least-squares computer program LETAGROP to the experimental (emf H) data, taking into account the hydrolytic species of V3+ ion, indicates that under the experimental conditions employed the complexes [VHL]2+, [VL]+, [V(OH)L], [V(OH)2L]-, [VL2]-, [V(OH)L2]2-, [VL3]3- and [V(OH)L3]4- with oxalic acid, the complexes [VHL]2+, [VL]+, [VL2]-, [V(OH)L2]2-, [V(OH)2L2]3-, [VL3]3- and [V(OH)L3]4- with malonic acid, and the [VL]+ and [V(OH)L] complexes with succinic acid were formed. The stability constants of the complexes formed were determined |
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