81409-00-9Relevant academic research and scientific papers
Measurement of Acid-Base Equilibrium Constants in Acetonitrile/18-Crown-6 Solutions
Kovach, Ildiko M.
, p. 2184 - 2186 (1983)
Absorbance data were collected at three wavelength for different mixtures of acetonitrile solutions of acetic acid and substituted phenolates in order to define ionic equilibria.Formation of hydrogen bonded adducts between acid and phenolate in concentration-dependent stoichiometry renders the data, even from very dilute solutions, too complex for an exact algebraic analysis.A quite accurate assessment of the acid-base equilibrium constants is possible, by using only the calculated concentrations of free acids and bases at each ratio of acid/base.Plotting such apparent equilibrium constants vs. the acid/base ratio permits an extrapolation to zero acid concentration in which limit the true value of the acid-base equilibrium constant can be obtained.A similar technique can lead to an estimation of formation constants for conjugate adducts in acetonitrile.
Synthesis and spectral study of salts derived from quinone mono- and dioximes
Avdeenko,Glinyanaya,Pirozhenko
, p. 1480 - 1487 (2007/10/03)
Aluminum, zinc, copper(II), nickel(II), and alkali metal (lithium, sodium, potassium, and cesium) salts of 1,4-benzoquinone mono-and dioximes, 1,2-naphthoquinone 2-oximes, and 1,2-naphthoquinone 1-oximes were synthesized. According to the IR and 1H and 13C NMR spectral data, all the salts in the solid state exist in the quinone oxime form. The alkali metal salts in solution also exist in the quinone oxime form; some of them give rise to metallotropic Z,E-isomerization and o-quinone oxime-nitrosophenol tautomerism.
