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Oxovanadium(<scp>IV</scp>) complexes of mercaptocarboxylic acids
- Source :
- J. Chem. Soc., Dalton Trans.. :1849-1855
- Publication Year :
- 1993
- Publisher :
- Royal Society of Chemistry (RSC), 1993.
-
Abstract
- Complex formation between oxovanadium(IV) and a series of aliphatic mercaptocarboxylic acids (mercaptoacetic, 2- and 3-mercaptopropionic, 2-mercaptosuccinic, and meso-2,3-dimercaptosuccinic) was studied in aqueous solution by potentiometric and spectroscopic (EPR and electronic absorption) techniques. A comparison with the complexes of the corresponding hydroxycarboxylic acid analogues was also made. The most interesting finding is that VO2+ has a similar affinity to the rather soft thiolate-S donors as to the hard alcoholate-O donors, if these donors are in chelatable position with a hard carboxylate group. The bidentate mercaptocarboxylates form (CO2–, S–)-co-ordinated mono and bis complexes, while bis complex formation is rather hindered with the tridentate 2-mercaptosuccinic acid. Due to the high denticity of the ligand, 2,3-dimercaptosuccinic acid readily forms oligomeric species via the co-ordination of all potential donor groups.
Details
- ISSN :
- 13645447 and 03009246
- Database :
- OpenAIRE
- Journal :
- J. Chem. Soc., Dalton Trans.
- Accession number :
- edsair.doi...........990d2bd6931b8f84e0f7d2bd0b98544e