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Question

Albucidis used in medical practise in the form of sodium salt. Find acidity Centre in the molecule and write its reaction with sodium hydroxide with salt formatiom

Answer 1

Albucid (an antibiotic used for eye infection; eye drops)

There are two very electronegative moieties (-SO2- and -OMe) surrounding the "top" nitrogen atomic center; this nitrogen is currently carrying a "proton" in the figure. Due to such electron withdrawing environment, this proton is easily reacting with a base (e.g., sodium hydroxide; NaOH), and lead to a "salt" species, and rendering the medication more water soluble. The reaction is proceeding through a 1-to-1 equivalence, leading to the mono-sodium salt molecule. The negative charge isn't specifically localized onto the nitrogen atom center but is instead delocalized between the various electron-reach atoms as represented by the dotted line. Because of such delocalization, the anion is stable in water solution.