Nitronium tetrafluoroborate

Nitronium tetrafluoroborate is an inorganic compound with formula NO₂BF₄. It is a salt of nitronium cation and tetrafluoroborate anion.^[1] It is a colorless crystalline solid, which reacts with water to form the corrosive acids HF and HNO₃. As such, it must be handled under water-free conditions. It is sparsely soluble in many organic solvents.

Nitronium tetrafluoroborate

Names
Other names nitronium fluoroborate, NO 2BF 4
Identifiers
CAS Number	13826-86-3 Y
3D model (JSmol)	Interactive image
ChemSpider	9248612
ECHA InfoCard	100.034.107
EC Number	237-533-5
PubChem CID	11073463
CompTox Dashboard (EPA)	DTXSID001014531
InChI InChI=1S/BF4.NO2/c2-1(3,4)5;2-1-3/q-1;+1 Key: RGVZMPONLYFINH-UHFFFAOYSA-N
SMILES [B-](F)(F)(F)F.[N+](=O)=O
Properties
Chemical formula	BNO2F4
Molar mass	132.81
Hazards
GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H314, H317, H334
Precautionary statements	P260, P261, P264, P272, P280, P285, P301+P330+P331, P302+P352, P303+P361+P353, P304+P340, P304+P341, P305+P351+P338, P310, P321, P333+P313, P342+P311, P363, P405, P501
Safety data sheet (SDS)
Related compounds
Other cations	Nitrosonium tetrafluoroborate
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Y verify (what is YN ?) Infobox references

Preparation

Nitronium tetrafluoroborate can be prepared by adding a mixture of anhydrous hydrogen fluoride and boron trifluoride to a nitromethane solution of nitric acid or dinitrogen pentoxide.^[2]

Applications

Nitronium tetrafluoroborate is used in organic synthesis as an electrophilic nitrating agent and a mild oxidant.^[3]