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Sodium tetraphenylboron

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Sodium tetraphenylboron Basic information
Sodium tetraphenylboron Chemical Properties
  • Melting point:300 °C
  • storage temp. 2-8°C
  • solubility relatively well soluble in water. A 0.1 M aqueous solution is generally used as reagent.
  • form Solid
  • color White
  • PH8 (50g/l, H2O, 20℃)
  • Water Solubility SOLUBLE
  • Sensitive Light Sensitive
  • Merck 14,8690
  • BRN 3599783
  • Stability:Stable. Incompatible with strong acids, strong oxidizing agents. Light sensitive.
  • CAS DataBase Reference143-66-8(CAS DataBase Reference)
  • EPA Substance Registry SystemBorate(1-), tetraphenyl-, sodium (143-66-8)
Safety Information
  • Hazard Codes Xn,Xi
  • Risk Statements 22-36/37/38
  • Safety Statements 26-36/37-36-24/25
  • RIDADR UN 2811 6.1/PG 3
  • WGK Germany 3
  • RTECS ED3362500
  • 8
  • TSCA Yes
  • HazardClass 6.1
  • PackingGroup III
  • HS Code 29310095
  • ToxicityLD50 orally in Rabbit: 288 mg/kg
Sodium tetraphenylboron Usage And Synthesis
  • Chemical Propertieswhite powder
  • UsesSodium Tetraphenylboroate is a salt that is commonly used in inorganic and organometallic chemistry as a precipitating agent. Sodium Tetraphenylboroate is also utilized for the preparation of N-acylam monium salts and in coordination chemistry due to their favourable solubility in nonpolar sovlents and their crystallinity.
  • UsesDetermination of potassium, ammonium, rubidium, and cesium.
  • UsesAs reagent for determination of potassium, ammonium, rubidium and cesium ions: Barnard, Buechl, Chemist-Analyst 48, 44, 49 (1959); Montequi, Serrano, An. R. Acad. Farm. 26, 107 (1960).
  • General Description
    Sodium tetraphenylborate (Ph4BNa) undergoes rhodium-catalyzed addition reactions with N-phenylsulfonyl aldimines to afford R(Ph)CHNHSO2Ph.
  • Purification MethodsDissolve the borate in dry MeOH and add dry Et2O. Collect the solid and dry it in a vacuum at 80o/2mm for 4hours. It can also be extracted (Soxhlet) using CHCl3, and it crystallises from CHCl3 as snow-white needles. It is freely soluble in H2O, Me2CO but insoluble in pet ether and Et2O. An aqueous solution has pH  5 and can be stored for days at 25 or lower, and for 5 days at 45o without deterioration. Its solubility in polar solvents increases with decrease in temperature [Wittig & Raff Justus Liebigs Ann Chem 573 204 1950]. The salt can also be recrystallised from acetone/hexane or CHCl3, or from Et2O/cyclohexane (3:2) by warming the solution to precipitate the compound. Dry it in a vacuum at 80o. It dissolves in Me2CO at 50-60o to give a clear solution. After standing at this temperature for 10minutes the mixture is filtered rapidly through a pre-heated Büchner funnel, cooled and the crystals are collected and dried in a vacuum desiccator at room temperature for 3days [Abraham et al. J Chem Soc, Faraday Trans 1 80 489 1984]. If the product gives a turbid aqueous solution, the turbidity can be removed by treating with freshly prepared alumina gel and filtering. [Beilstein 16 IV 1624.]
Sodium tetraphenylboron Preparation Products And Raw materials
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