A rare example of a phosphine as a halogen bond acceptor

Area of Science:

• Crystal Engineering
• Supramolecular Chemistry
• Halogen Bonding

Background:

• Triphenylphosphine is a common organophosphorus compound.
• 1,3,5-trifluoro-2,4,6-triiodobenzene is a highly halogenated aromatic molecule.
• Halogen bonding typically involves electron-deficient halogen atoms acting as electrophiles.

Purpose of the Study:

• To prepare and characterize a cocrystal of triphenylphosphine and 1,3,5-trifluoro-2,4,6-triiodobenzene.
• To investigate the role of phosphorus in halogen bonding interactions.
• To explore the structural features of cocrystals involving organophosphorus compounds.

Main Methods:

• Single-crystal X-ray diffraction was used for structural determination.
• Crystallographic analysis was performed to identify intermolecular interactions.
• Spectroscopic methods may have been employed for characterization (details not provided in abstract).

Main Results:

• A cocrystal of triphenylphosphine and 1,3,5-trifluoro-2,4,6-triiodobenzene was successfully prepared.
• The crystal structure revealed a unique interaction where the phosphorus atom of triphenylphosphine acts as a halogen bond acceptor.
• This represents a rare instance of phosphorus participating in halogen bonding.

Conclusions:

• The study demonstrates the ability of phosphorus to act as a halogen bond acceptor.
• This finding expands the known repertoire of halogen bonding interactions.
• The results contribute to the field of crystal engineering and supramolecular chemistry by revealing novel bonding motifs.