硼弗化銀 化学特性,用途語,生産方法
外観
白色〜うすい褐色, 結晶〜結晶性粉末又は塊
溶解性
水に易溶。エタノールに可溶。水、エタノール及びアセトンに溶ける。
用途
ヘキサフルオロリン酸銀(I)と同様に、ハロゲン化物イオンもしくはハロゲン配位子を配位性の弱いテトラフルオロホウ酸イオンと置換させ、対カチオンの反応性を高めるために用いられる。ハロゲン化物イオンの引き抜きは、対応するハロゲン化銀の沈殿生成を駆動力として進行する。ハロゲン化銀は多くの溶媒に対して難溶であるため、平衡はハロゲン引き抜き?沈殿形成側へ片寄る。
用途
有機合成用試薬。
使用上の注意
不活性ガス封入
化学的特性
beige crystalline powder
使用
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.
主な応用
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.
一般的な説明
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.
安全性プロファイル
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.
合成
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.
硼弗化銀 上流と下流の製品情報
原材料
準備製品