Nitrosonium tetrafluoroborate

Nitrosonium tetrafluoroborate

Names
IUPAC name nitrosonium tetrafluoroborate
Other names nitrosyl tetrafluoroborate
Identifiers
CAS Number	14635-75-7
ChemSpider	9312255
Jmol interactive 3D	Image
PubChem	151929
InChI InChI=1S/BF4.NO/c2-1(3,4)5;1-2/q-1;+1 Key: KGCNVGDHOSFKFT-UHFFFAOYSA-N
SMILES [B-](F)(F)(F)F.N#[O+]
Properties
Chemical formula	BF4NO
Molar mass	116.81 g·mol^−1
Appearance	colourless crystalline solid
Density	2.185 g cm^−3
Melting point	250 °C (482 °F; 523 K) (sublimes)
Solubility in water	decomposes
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

Nitrosonium tetrafluoroborate, also called nitrosyl tetrafluoroborate, is a chemical compound with the chemical formula NOBF₄. This colourless solid finds use in organic synthesis as a nitrosating agent.^[1]

NOBF₄ is the nitrosonium salt of fluoroboric acid, and is composed of a nitrosonium cation, [NO]⁺, and a tetrafluoroborate anion, [BF₄]⁻.

Reactions

Nitrosonium tetrafluoroborate may be used to prepare metal salts of the type [M^II(CH₃CN)_x][BF₄]₂ (M = Cr, Mn, Fe, Co, Ni, Cu). The nitrosonium cation acts as the oxidizer, itself being reduced to nitric oxide gas:^[2]

M + NOBF₄ + xCH₃CN → [M(CH₃CN)_x](BF₄)₂ + NO

With ferrocene the ferrocenium tetrafluoroborate is formed.^[3]

References

1. "A15806 Nitrosonium tetrafluoroborate, 98%". Alfa Aesar website. Retrieved 2010-09-04.
2. Robert A. Heintz, Jennifer A. Smith, Paul S. Szalay, Amy Weisgerber, And Kim R. Dunbar. "11. Homoleptic Transition Metal Acetonitrile Cations with Tetrafluoroborate or Trifluoromethanesulfonate Anions". Inorg. Synth. 33: 75–83. doi:10.1002/0471224502.ch2.
3. Roger M. Nielson, George E. McManis, Lance K. Safford, Michael J. Weaver (1989). "Solvent and electrolyte effects on the kinetics of ferrocenium-ferrocene self-exchange. A reevaluation". J. Phys. Chem. 93 (5): 2152. doi:10.1021/j100342a086.