“Anti-electrostatic” (inter-anion) chalcogen bonding interactions

Abstract

In this work, the ability of 1,2-bis(dicyanomethylene)-cyclopropanide substituents to enable inter-anion interactions has been expanded to chalcogen bonding. An anionic selenium-based chalcogen-bond donor featuring this ligand displays “anti-electrostatic” interactions in the solid state. Three polymorphic structures of associates with both mono- and biaxial binding modes are discussed.