4,4′-Dipyridyl Dioxide·SbF₃ Cocrystal: Pnictogen Bond Prevails over Halogen and Hydrogen Bonds in Driving Self-Assembly

The SbF3·4,4′-dipyridyl N,N′-dioxide cocrystal is prepared and characterized via infrared spectroscopy and 121Sb and 123Sb nuclear quadrupole resonance. Single crystal X-ray analysis proves that a major role in cocrystal formation is played by Sb···O pnictogen bonds, the attractive interactions wherein antimony and oxygen act as the electrophilic and nucleophilic sites, respectively. Molecular electrostatic potential and natural bond orbital...