Difluorine complex

A difluorine complex is a molecular coordination complex involving a difluorine (F₂) group as a ligand. The first example was gold heptafluoride (AuF₇).^[1] Instead of being a gold(VII) compound, with all five fluorine atoms equally bonded to the central gold atom, the structure is an adduct of gold(V) fluoride (AuF₅) and F₂. This conclusion has been repeatedly supported by calculations.

Although other diatomic element complexes exist, difluorine complexes have a different hapticity. Dinitrogen complexes of main-group elements and dihydrogen complex feature a "side-on" bonding of the hydrogen group with both hydrogen atoms participating in the coordinate bonding (η²-H₂), whereas difluorine complexes feature "end-on" bonding with only one of the two fluorine atoms participating in the coordinate bonding (η¹-F₂).^[2]

References

^ Timakov, A. A.; Prusakov, V. N.; Drobyshevskii, Y. V. (1986). "Gold Heptafluoride". Doklady Akademii Nauk SSSR (in Russian). 291: 125–128.
^ Conradie, Jeanet; Ghosh, Abhik (2019). "Theoretical Search for the Highest Valence States of the Coinage Metals: Roentgenium Heptafluoride May Exist". Inorganic Chemistry. 58 (13): 8735–8738. doi:10.1021/acs.inorgchem.9b01139. PMID 31203606.

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[dokl-1] Timakov, A. A.; Prusakov, V. N.; Drobyshevskii, Y. V. (1986). "Gold Heptafluoride". Doklady Akademii Nauk SSSR (in Russian). 291: 125–128.

[2] Conradie, Jeanet; Ghosh, Abhik (2019). "Theoretical Search for the Highest Valence States of the Coinage Metals: Roentgenium Heptafluoride May Exist". Inorganic Chemistry. 58 (13): 8735–8738. doi:10.1021/acs.inorgchem.9b01139. PMID 31203606.

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Difluorine complex

References

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