New Insight into and Characterization of the Aqueous Metal-Enol(ate) Complexes of (Acetonedicarboxylato)copper.

ABSTRACT: Nearly 50 years have passed since the classic studies by Larson and Lister [Larson D. W.; Lister M. W.Can. J. Chem.1968, 46, 823]and Hay and Leong [Hay R. W.; Leong K. N.J. Chem. Soc. A1971, 0, 3639]on the copper-catalyzed decarboxylation of acetonedicarboxylic acid (H₃Acdica). Although the authors laid the foundations for what we know about this reaction; still very little information exists regarding the underlying aqueous metal-enol(ate)s of (acetonedicarboxylato)copper. In this study, UV-visible titrations revealed three pK values, pK _[Cu(H2A)], pK _[Cu(HA)], and pK _[Cu(A)]. We associated the first two with ionization of α-carbon CH₂ groups in [Cu^II(H₂Acdica)_keto]^1+</

SUBMITTER: Jefferson WA 

PROVIDER: S-EPMC6645097 | biostudies-literature | 2017 Oct

REPOSITORIES: biostudies-literature