Boron tetraphenyl salts

In presence of Boron Tetraphenyl salts to ensure ion pair reaction only Free ion reaction,... 

Theory In general, quaternary nitrogen containing compounds like—choline chloride, acetylpyridinium chloride, benzethonium chloride, and bethanechol chloride readily form insoluble salts quantitatively with tetraphenyl boron and this puts forward the basis for the gravimetric assay of the above cited pharmaceutical substances. 

Eq. (a) shows that the quaternary salt gets quantitatively precipitated by sodium tetraphenyl boron as the complexing agent. Eq. (b) depicts that quaternary compounds shall readily react with certain anionic dye, such as bromophenol blue, to yield a blue, chloroform-soluble complex. 

Biphenyldiyl 2-bromo-2 -biphenyl telluronium bromide (m.p. 264 , yield 79%) and the corresponding iodine compound (m.p. 265°, yield 63%) were similarly prepared Tetraphenyl tellurium transferred an anionic phenyl group to benzaldehyde and triphenyl boron yielding triphenyl telluronium salts. ... 

Tetraphenyl phosphonium salts can be prepared from pentaphenylphosphorane by reaction with triphenyl boron, a hydrogen halide or an alkyl halide with ultraviolet radiation. 

We are strictly content with studying quantitative determinations with tetraphenyl-boron ion (TPB) ( 6115)46 . Its sodium and lithium salts are soluble in water. Its rubidium, cesium, potassium, and ammonium salts are very poorly soluble. The solubility product of potassium tetraphenylboron is Als(K(C6H5)4B) = 2.25 x 10 . Likewise, numerous quaternary ammoniums and protonated amines form slightly soluble salts with tetraphenylboron ion according to the reaction... 

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