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- W2032033234 abstract "The dissociation constants of the diprotonated chalcogenobispyridines have been determined using potentiometric titrations to establish a method for the measurement of the ability of a bridging ligand to relay electronic effects. The relationship between pKa and structure of the chalcogenobispyridines results from a balance between inductive, mesomeric, and steric effects. Delocalization of cationic charge onto the bridgehead increases the apparent electronegativity of the bridging atom, thereby relaying a strong base-weakening effect to the site of first deprotonation. Such delocalization was found to be a function of both the substitution site (4-X > 2-X ≫ 3-X) and orbital overlap requirements (S > O ≈ Se > Te). J. Heterocyclic Chem., (2011)." @default.
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- W2032033234 date "2011-04-15" @default.
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- W2032033234 title "The dissociation constants of diprotonated chalcogenobispyridines: Transmission of electronic effects across chalcogen bridges" @default.
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- W2032033234 doi "https://doi.org/10.1002/jhet.651" @default.
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