Issue 9, 1972

Determination of H̲ acidity function for glycolic sodium glycoxide by use of t-butylphenols as indicators and a comparison with that found by use of amine indicators

Abstract

An H[> with combining low line] acidity scale, (H[> with combining low line])PhEG, for solutions of sodium glycoxide in ethylene glycoxide in ethylene glycol (EG) has been set up at 25 °C by use of t-butylphenols as indicator acids (HA). The value of H[> with combining low line] in this scale at a particular glycoxide concentration is lower than the corresponding value in the H[> with combining low line] scale, (H[> with combining low line])AmEG, set up earlier for the same system with nitroanilines and -diphenylamines as indicator acids (HA). In a bid to understand the observed differences in the two H[> with combining low line] values activity coefficients (fHA) of a typical neutral phenol as well as an amine indicator in glycoxide solutions of increasing concentration in glycol (glycol being taken as the standard state) have been determined by solubility and partition experiments respectively. An attempt has been made to explain the observed variation of fHA as a function of glycoxide concentration and to understand the corresponding variation of the activity coefficients of the anions (fA–) of the amine and phenol indicators in these solutions.

Article information

Article type
Paper

J. Chem. Soc., Perkin Trans. 2, 1972, 1046-1050

Determination of H[> with combining low line] acidity function for glycolic sodium glycoxide by use of t-butylphenols as indicators and a comparison with that found by use of amine indicators

L. Aiyar, A. N. Datta and K. K. Kundu, J. Chem. Soc., Perkin Trans. 2, 1972, 1046 DOI: 10.1039/P29720001046

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