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Conant's investigations helped in the development of a more comprehensive understanding of the nature of acids and bases. [25] He investigated the properties of certain acids which were many times stronger than mineral acid solutions in water. Conant christened them " superacids " [26] and laid the foundation for the development of the Hammett acidity function . [27] These investigations used acetic acid as the solvent and demonstrated that sodium acetate behaves as a base under these conditions. [28] [29] This observation is consistent with Brønsted–Lowry acid–base theory (published in 1923) [30] but cannot be explained under older Arrhenius theory approaches . Later work with George Wheland [31] and extended by William Kirk McEwen [32] looked at the properties of hydrocarbons as very weak acids, including acetophenone , phenylacetylene , fluorene and diphenylmethane . Conant can be considered alongside Brønsted , Lowry , Lewis , and Hammett as a developer of modern understanding of acids and bases. [33]

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