Editorial: Advanced Research in Halogen Bonding

Abstract

The Special Issue on “Advanced Research in Halogen Bonding” is a collection of 17 original articles reporting the results of theoretical and experimental studies that provide new insights into this fascinating intermolecular interaction [...]

Polymorphism and isomorphism in trans-bis(2,5-diiodopyridine)dihalocopper(ii) complexes: theoretical and crystallographic studies

“…Carbon-bound halogen atoms have nucleophilic and electrophilic parts; (a) the electrophilic part is due to the electron deficiency along the C-X bond, and hence there is a formation of a positive electrostatic potential end cap, which is known as s-hole. [1][2][3][4][5][6][7][8] The interaction of the electrophilic part of the covalently bonded halogen atom with nucleophiles is known as a halogen bond (D-XÁ Á ÁA), where D-X is the halogen bond donor and A is the halogen bond acceptor. The XÁ Á ÁA distance is usually less than the sum of van der Waals radii of X and A, and the D-XÁ Á ÁA angle is essentially linear.…”