A new Ag(I) complex with 6-aminouracil: synthesis, characterization and molecular modeling

Uracil derivatives have been investigated as potential precursors for the synthesis of compounds with pharmacological applications. Thus, the objective of this work was to synthesize and characterize a new Ag(I) complex with 6-aminouracil (6AU). To this, 0.25 mmol of 6AU and 0.50 mmol of KOH were dissolved in 10 mL of water and stirred for 10 min. Subsequently, 0.50 mmol of AgNO₃ dissolved in 10 mL of water was added to the solution, and the reaction mixture was stirred for 1 h. The precipitate formed was filtered, washed with cold water, and placed in a desiccator with P₄O₁₀ for drying. The elemental analysis results suggest the following composition for the complex: Ag₂C₄H₃N₃O₂. The infrared spectrum allows to infer the coordination of 6AU to Ag by N and O atoms. The solid-state ¹³C NMR spectrum shows significant chemical shift changes. DFT study reveals interaction regions on oxygen and nitrogen atoms.