Solution stabilities of some mixed ligand complexes of UO22+ and Th4+ with complexones and salicylic acids
Creators
- 1. Hari Singh Gour Vishwavidyalaya, Sagar (India). Department of Chemistry
Description
Formation constants (log Ksub(MAL)sup(MA)) of mixed ligands complexes (MAL), where M = UO22+ or Th4+, A = IMDA, NTA, HEDTA, EDTA, CDTA or DTPA, L = salicylic acid (SA) or 5-sulphosalicylic acid (SSA), have been determined by pH titrations using Irving-Rossotti approach at 25oC and at I =0.2 (mol dm-3, KNO3). The solution stabilities exhibit the sequence (i) Th4+>UO22+, (ii) IMDA>NTA>HEDTA>EDTA>CDTA>DTPA, and (iii) SA>SSA with respect to metal ions, primary ligands and secondary ligands, respectively. The formation constants log Ksub(ML)sup(M) and log Ksub(ML2)sup(ML) have also been determined. The Δlog K values have been found to be negative-increasing numerically with the negative charge on the deprotonated primary ligand (An-). (author). 17 refs., 1 tab
Additional details
Publishing Information
- Journal Title
- National Academy Science Letters
- Journal Volume
- 14
- Journal Issue
- 11
- Journal Page Range
- p. 409-411.
- ISSN
- 0250-541X
- CODEN
- NASLDX
INIS
- Country of Publication
- India
- Country of Input or Organization
- India
- INIS RN
- 24052649
- Subject category
- S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;
- Descriptors DEI
- CDTA; CHEMICAL REACTION KINETICS; DTPA; EDTA; HEDTA; LIGANDS; NTA; SALICYLIC ACID; STABILITY; THORIUM COMPLEXES; THORIUM NITRATES; URANYL COMPLEXES; URANYL NITRATES
- Descriptors DEC
- ACTINIDE COMPLEXES; ACTINIDE COMPOUNDS; AMINO ACIDS; CARBOXYLIC ACIDS; CHELATING AGENTS; COMPLEXES; DRUGS; HYDROXY ACIDS; KINETICS; NITRATES; NITROGEN COMPOUNDS; ORGANIC ACIDS; ORGANIC COMPOUNDS; OXYGEN COMPOUNDS; RADIOPROTECTIVE SUBSTANCES; REACTION KINETICS; RESPONSE MODIFYING FACTORS; THORIUM COMPOUNDS; URANIUM COMPLEXES; URANIUM COMPOUNDS; URANYL COMPOUNDS