Sodium tetraphenylborate oxidation

The larger cations of Group 1 (K, Rb, Cs) can be precipitated from aqueous solution as white solids by addition of the reagent sodium tetraphenylborate, NaB(C( H5)4. Sodium can be precipitated as the yellow sodium zinc uranium oxide ethanoate (sodium zinc uranyl acetate). NaZn(U02)3(CH3C00)y. 9H2O. by adding a clear solution of zinc uranyl acetate in dilute ethanoic acid to a solution of a sodium salt. 

Sodium Tetraphenylborate TS Dissolve 1.2 g of sodium tetraphenylborate in water to make 200 mL. If necessary, stir for 5 min with 1 g of freshly prepared hydrous aluminum oxide, and filter to clarify. 

Sodium tetraphenylborate and diphenylhydroxyborane both yield biphenyl on anodic oxidation. Similar results can be obtained using a variety of chemical oxidants. ... 

One of the first ideas to study unusual oxidation states caused by relativistic effects was an attempt to reduce Lr The relativistic stabilization of the 7pi/2 electron in the ground state of Lr (7s 7pi/2) was the reason to expect an enhanced stability of the 1+ oxidation state in contrast to the stable 3+ state of the lanthanides. Attempts to reduce Lr " with and Cr in dilute HCl were, however, unsuccessful and a limit on the reduction potentials of the Lr /Lr couple was estimated as < -0.44 V [204]. Later attempts to reduce Lr " with Sm and coprecipitate Lr " with Rb by using sodium tetraphenylborate or chloroplatinic acid were also unsuccessful, and the upper limit for the Lr /Lr " couple of -1.56 V was estimated making it unlikely that Lr " can exist in aqueous solutions [205]. There were similar ideas to reduce Db " to Db and Sg " to to check the stability of the lower oxidation states caused, as was... 

The diiodo complex, /ra j-[Col2(TTP)], is prepared by air oxidation anhydrous cobalt(II) iodide is stirred with the ligand in nitromethane, Whereby a cobalt complex containing tetrahedral Coll" species is formed, which is then isolated by adding ether. The complex is redissolved in nitromethane and exposed to air for a few days. Successive additions of sodium tetraphenylborate and ether precipitates the desired compound. 

Sodium tetraphenylborate or Kalignost , Na[B(C6Hs)4] Dissolve 34.2 g in around 900 mL of distilled water and add 5 g of aluminum oxide (AI2O3, analytical-reagent grade, a.g.) to... 

The electrolysis of vinyl ethers in the presence of a supporting electrolyte either a tetraalkylammonium salt, an inorganic salt such as sodium perchlorate, or sodium tetraphenylborate readily leads to polymerization. In all cases, the mechanism of polymerization appears to be cationic, although different workers differ with respect to the precise steps involved. For example, Cerai and coworkers [128] have proposed that when tetra-M-butylammonium triiodide is used as the supporting electrolyte, the triiodide anion undergoes oxidation by the following anodic process, which generates elemental iodine ... 

A range of structurally different chiral primary amines was converted into the corresponding iminium tetraphenylborate salts (Fig. 5.3) and tested in the asymmetric epoxidation of a standard test substrate, 1-phenylcyclohexene, using Oxone (4 equiv) as the stoichiometric oxidant, sodium carbonate (8 equiv) as base, in acetonitrile/water (2 1) at 0 °C (Table 5.1) [19,21]. 

---