Add time:08/07/2019         Source:sciencedirect.com

In the reaction between 3,5-dinitrosalicylic acid and urotropine, the proton of the phenolic group is transferred to a nitrogen atom of urotropine to form a hydrogen-bonded ion-paired [N⋯Ophenolate=2.777(4)Å] compound. An analogous reaction between the acid and dicyclohexylamine yields a centrosymmetric ion-paired dimer [N⋯Ophenolate=2.864(4), N⋯Ocarbonyl=2.940(5)Å]. The structures of the two compounds are discussed in relation to their infrared spectral features. The structure of the anion is also investigated theoretically by geometry-optimization calculations.

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