Effect of Structure on Charge Distribution in the Isatin Anions in Aprotic Environment: Spectral Study.

ABSTRACT: Five isatin anions were prepared by deprotonation of initial isatins in aprotic solvents using basic fluoride and acetate anions (F^- and CH₃COO^-). The F^- basicity is sufficient to deprotonate isatin NH hydrogen from all the studied compounds. This process is reversible. In the presence of proton donor solvents, the anions form the corresponding isatins. The isatin hydrogen acidity depends on the overall structure of the isatin derivatives. The anions were characterized by ultraviolet-visible (UV-Vis), Fourier transform infrared (FTIR) and nuclear magnetic resonance (NMR) spectroscopy. Interestingly, the anions form aggregates at concentrations above 10^-3 mol·dm^-3. Further, the effect of cations on the UV-Vis spectra of the studied anio

SUBMITTER: Tisovsky P 

PROVIDER: S-EPMC6150331 | biostudies-literature | 2017 Nov

REPOSITORIES: biostudies-literature