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| Titel: |
REACTION BETWEEN [PdCl4]2- AND 5,5-DIMETHYL-2-THIOXOIMIDAZOLIDIN-4-ONE |
| Auteur: |
Crisponi, Guido Cristiani, Franco Devillanova, Francesco A. Isaia, Francesco Pinna, Rosalba Verani, Gaetano |
| Verschenen in: |
Journal of coordination chemistry |
| Paginering: | Jaargang 30 (1993) nr. 3-4 pagina's 293-303 |
| Jaar: |
1993-12-01 |
| Inhoud: |
The reaction between 5,5-dimethyl-2-thioxoimidazolidin-4-one (H2L) and [PdCl4]2- has been studied in aqueous solution by potentiometric and spectrophotometric measurements. In the presence of the palladium salt, H2L is completely monodeprotonated (HL-); from spectrophotometric measurements, only two complexes having 1:1 and 1:2 Pd/ligand mol ratios have been identified. Potentiometric titrations, carried out on solutions with 1:1, 1:2, 1:3 and 1:4 metal/ligand mol ratios, show that these complexes must be formulated as Pd(HL)2 and [Pd2(HL)2(μ-H2O)(μ-OH)]+. Ionization constants of the pure ligand and formation constants of the complexes give pH distribution curves of the various species and the spectra of the two complexes. From MeOH, S-coordinated Pd(H2L)nCl2 (n = 2-4) complexes have been separated in the solid state; from water, two complexes of formula Pd(H2L)(HL)Cl and Pd(HL)Cl have been obtained with HL- N,S-coordinated to the metal. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 69 van 116 gevonden artikelen
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