Nitrosonium tetrafluoroborate

Nitrosonium tetrafluoroborate
IUPAC name nitrosonium tetrafluoroborate
Other names nitrosyl tetrafluoroborate
Identifiers
CAS number	14635-75-7
PubChem	151929
Properties
Molecular formula	BF4NO
Molar mass	116.81 g mol−1
Appearance	colourless crystalline solid
Density	2.185 g cm−3
Melting point	250 °C (sublimes)
Solubility in water	decomposes
Y tetrafluoroborate (verify) (what is: Y/N?) Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
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] With ferrocene the ferrocenium tetrafluoroborate is formed.^[3]

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

References

1. ^ "A15806 Nitrosonium tetrafluoroborate, 98%". Alfa Aesar website. http://www.alfa.com/en/GP100W.pgm?DSSTK=A15806. 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.