Nitrosonium tetrafluoroborate

Nitrosonium tetrafluoroborate

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Names
IUPAC name nitrosonium tetrafluoroborate
Other names nitrosyl tetrafluoroborate
Identifiers
CAS Number	14635-75-7 Y
ChemSpider	9312255 N
Jmol 3D model	Interactive image
PubChem	151929
InChI InChI=1S/BF4.NO/c2-1(3,4)5;1-2/q-1;+1 N Key: KGCNVGDHOSFKFT-UHFFFAOYSA-N 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
Vapor pressure	{{{value}}}
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.

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:

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

With ferrocene the ferrocenium tetrafluoroborate is formed.