6649. Nitrosyl Tetrafluoroborate

Nomenclature

CAS number: 14635-75-7
Nitrosonium tetrafluoroborate; nitrosyl borofluoride; nitrosyl fluoborate.
BF4NO; mol wt 116.81.
B 9.26%, F 65.06%, N 11.99%, O 13.70%.
NOBF4.

Description and references

Prepd according to the equation: 2 HBF4 + N2O3 →2 NOBF4 + H2O: Wilke-D"orfurt, Balz, Z. Anorg. Allg. Chem. 159, 219 (1927); Balz, Mail"ander, ibid. 217, 162 (1934); H. S. Booth, D. R. Martin, Boron Trifluoride and Its Derivatives (New York, 1949) p 133 sqq. Review of tetrafluoroborates: Sharp, Adv. Fluorine Chem. 1, 68-128 (1960).

Properties

Birefringent, orthorhombic, hygroscopic platelets. d425 2.185. Sublimes at 0.01 mm and 250° without decompn. Decomposed by water. May be stored in glass bottles if absolutely dry.

Use

In the prepn of diazonium fluoborates.