Silber(I)tetrafluoroborat Chemische Eigenschaften,Einsatz,Produktion Methoden
R-Sätze Betriebsanweisung:
R34:Verursacht Verätzungen.
R22:Gesundheitsschädlich beim Verschlucken.
R20/21/22:Gesundheitsschädlich beim Einatmen,Verschlucken und Berührung mit der Haut.
S-Sätze Betriebsanweisung:
S26:Bei Berührung mit den Augen sofort gründlich mit Wasser abspülen und Arzt konsultieren.
S36/37/39:Bei der Arbeit geeignete Schutzkleidung,Schutzhandschuhe und Schutzbrille/Gesichtsschutz tragen.
S45:Bei Unfall oder Unwohlsein sofort Arzt zuziehen (wenn möglich, dieses Etikett vorzeigen).
S27:Beschmutzte, getränkte Kleidung sofort ausziehen.
Chemische Eigenschaften
beige crystalline powder
Verwenden
Silver tetrafluoroborate finds applications as a useful reagent in inorganic, organic and organomettalic chemistry. It acts as a moderately strong oxidant in dichloromethane, replaces halide anions and ligands with weakly coordinating tetrafluoroborate anions, and behaves as a catalyst for cyclization reactions. It is a potent promoter for chemical glycosylation.
Application
Silver tetrafluoroborate is a transition metal salt extensively used in organic syntheses.
Gold Catalysts — 21st Century ′Gold Rush′
Displaces chloride from precious metal complexes used in the oxidation of alcohols by persulfate.
Provides a silver-ion template for improved macrolatamization of a linear dipeptide.
Allgemeine Beschreibung
Silver tetrafluoroborate (AgBF4) is used as a Lewis acid in organic synthesis. It is known to have a high affinity towards organic halides. It is employed in organic reactions like activation of acyl chlorides, nucleophilic substitution, rearrangement, cycloaddition, cyclization, ring expansion and oxidation.
Sicherheitsprofil
Poison by intravenous route. When heated to decomposition it emits toxic fumes of F-. Used for plating baths. See also SILVER COMPOUNDS, BORON COMPOUNDS, and FLUORIDES.
Synthese
Preparation of silver tetrafluoroborate and MBDP
This reaction is completed with the lights off. In a 25 mL round-bottom flask covered with aluminum foil, AgBF4 (0.0397 g (0.20 mmol) is dissolved in 10 mL CH3CN. To the solution MBDP (0.0645 g, 0.20 mmol) is added and allowed to stir for 3 hours. The solution is concentrated under vacuum to approximately 3 mL then layered with Et2O. The flask is placed in the freezer. X-ray quality crystals are formed.
Silber(I)tetrafluoroborat Upstream-Materialien And Downstream Produkte
Upstream-Materialien
Downstream Produkte
