difluorine complex

A difluorine complex is a molecular complex involving a difluorine molecule (F₂) and another molecule. The first example was gold heptafluoride (AuF₇). Instead of being a gold(VII) compound, AuF₇ is an adduct of gold(V) fluoride (AuF₅) and F₂. This conclusion has been repeatedly supported by calculations. Unlike dihydrogen complexes, which feature η²-H₂, difluorine complexes feature "end-on" or η¹-F₂ ligand.{{cite journal |doi=10.1021/acs.inorgchem.9b01139|title=Theoretical Search for the Highest Valence States of the Coinage Metals: Roentgenium Heptafluoride May Exist|year=2019|last1=Conradie|first1=Jeanet|last2=Ghosh|first2=Abhik|journal=Inorganic Chemistry|volume=58|issue=13|pages=8735–8738|pmid=31203606}}