Nitrosonium tetrafluoroborate, 98%
|UN#:||UN3260||Hazard Class:||8||Packing Group:||II|
|Alternate Name:||Nitrosyl tetrafluoroborate|
Pricing and Availability
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|Formula:||NOBF4||Boiling point:||250°/0.01mm subl.|
|Melting point:||250° subl.||Sensitivity:||Moisture Sensitive|
Crystalline nitrosating agent: Secondary amines to nitrosamines: Chem. Ber., 89, 2374 (1956); deamination of primary amides: J. Org. Chem., 30, 2386 (1965); conversion of arylhydrazines to azides: Tetrahedron Lett., 28, 5091 (1987). In organic solvents, converts arylamines directly to diazonium tetrafluoroborates which undergo the Balz-Schiemann reaction (see Tetrafluoroboric acid, L14037) in situ to give high yields of aryl fluorides: Chem. Ber., 88, 1939 (1955); EP 430,434 (1991). Methyl or methoxy substituted aromatics in acetonitrile give the nitrosoaromatics in good yield: J. Org. Chem., 59, 5573 (1994).
Convenient catalyst for iodination of aromatics by iodide ion with air as oxidant: J. Org. Chem., 53, 3548 (1988), or for addition of iodine (or iodine + nucleophile) to alkenes: Acta Chem. Scand. B, 43, 902 (1989).
Undergoes an interesting insertion reaction with diarylcyclopropanes: Chem. Lett., 233 (1988):
With excess reagent, oxidation of the isoxazoline to the isoxazole occurs.
|Harmonized Tariff Code:||2812.90|
GHS Hazard and Precautionary Statements
Causes severe skin burns and eye damage. Causes serious eye damage.
Do not breathe dust/fume/gas/mist/vapours/spray. IF ON SKIN (or hair): Remove/Take off immediately all contaminated clothing. Rinse skin with water/shower. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. IF SWALLOWED: Rinse mouth. Do NOT induce vomiting. Store locked up. Dispose of contents/container in accordance with local/regional/national/international regulations.
Risk & Safety
|Contact with acids liberates toxic gas. Causes burns.|
|Keep container tightly closed and dry. In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. Wear suitable protective clothing, gloves and eye/face protection. In case of accident or if you feel unwell, seek medical advice immediately (show the label where possible).|