Difluorine complex

A difluorine complex is a molecular complex involving a difluorine molecule (F₂) and another molecule. The first example was gold heptafluoride (AuF₇).^[1] Instead of being a gold(VII) compound, AuF₇ is an adduct of gold pentafluoride (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.^[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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v t e Coordination complexes
H donors:	H⁻ H₂
B donors:	BR₂⁻ B_mH_n
C donors:	R⁻ RC(O)⁻ HC(O)⁻ CH₂＝CH-CH₂⁻ C(CH₂)₃ CH₂＝CH₂ RC₂R C₆H₄ CN⁻ CO CO₂ C^4- C₆R₆ C₆₀ & C₇₀ RNC =CR₂ ≡CR C₅H₅⁻ C₉H₇⁻
Si donors:	H_nSiR_4−n R₃Si⁻
N donors:	NH₃ N₃⁻ imidazole NO RNO NO₂⁻ py amino acid N^3- RN^2- RCN bipy porphyrin (Me₃Si)₂N⁻ N₂ NCS^-
P donors:	PR₃ PR₂⁻ PR₂OH
O donors:	H₂O R₂O RO⁻ O^2- O₂ CO₃^2-/HCO₃^- C₂O₄^2- RCO₂⁻ acac R₂CO ONO⁻ NO₃⁻ ClO₄^- C₅H₅NO OSR₂ SO₄^2- PO₄^3- OPR₃
S donors:	R₂NCS₂⁻ RS⁻ R₂S R₂C₂S₂^2- SO₂ S₂O₃^2- SR₂O NCS^-
Halide donors:	F⁻ F₂ Cl⁻ Br⁻ I⁻

See also

References