Solid-to-solid formation at the solid–liquid interface leading to a chiral coordination polymer from an achiral monomer

Abstract

An achiral crystal of a simple mononuclear copper complex [Cu^II(C₆H₈N₂)₂SO₄]·H₂O (1), on dipping into an aqueous azide solution, transforms into a chiral crystal of a coordination polymer [Cu^II(C₆H₈N₂)(N₃)₂]_n (2) in a solid–liquid interface reaction demonstrating replacement of a sulfate anion by an azide anion from an aqueous solution.