Complexes of W(VI) and Mo(VI) with glycolic, lactic, chloro- and phenyl-lactic, mandelic, and glyceric acids studied by 1 H and 13 C nuclear magnetic resonance spectroscopy
1987; NRC Research Press; Volume: 65; Issue: 4 Linguagem: Inglês
10.1139/v87-140
ISSN1480-3291
AutoresM. Madalena Caldeira, M. Luísa Ramos, Victor M. S. Gil,
Tópico(s)Chemical and Physical Properties in Aqueous Solutions
ResumoA proton and carbon-13 nuclear magnetic resonance study is reported on the number, stoichiometry, geometry, and stability of the complexes that form when sodium tungstate or sodium molybdate is mixed with each one of the following α-hydroxyacids in aqueous solution at pH values in the range 3–8: glycolic, lactic, chloro-3- andphenyl-3-lactic, mandelic, and glyceric acids. The predominant complexes have 1:2 composition and pK of formation of the order of −5 to −16.
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