Phosphonium, tetraphenyl-, bromide

Reactions of Phosphonium Salts.- Interest continues in the effects of solvent on the rate of alkaline decomposition of phosphonium salts. It has now been shown that, in the respective reactions of hydroxide ion and methoxide ion with tetraphenyl-phosphonium bromide in mixtures of DMSO and methanol, the rates of the reactions increase as the proportion of the dipolar aprotic... 

To take advantage of both modified layered silicate and the substantial presence of phosphorus, the combined use of phosphorus-modified silicates and phosphorus compounds may represent an innovative solution to achieve high levels of flame retardancy. Phosphonium-modified layered silicates in epoxy resins were associated with organo-phosphorus FRs by Schartel et al.59 Ion exchange of Na-montmorillonite was carried out using tetraphenyl phosphonium bromide. Triphenyl phosphate and a reactive phosphorus compound were used as FR incorporated in the epoxy resin. 

Tetracyclopropylphosphonium bromide (6) has been prepared by combining equimolar amounts of tricyclopropylphosphane and bromocyclopropane. The salt is air sensitive and decomposes to tricyclopropyl-A -phosphane oxide and bromocyclopropane. When tetraphenyl-phosphonium bromide was treated with cyclopropyllithium, cyclopropyldiphenylphosphane was formed ... 

Mechanical Behavior. The ionomers, - poly[Isobutylene-co-(4-methyl styrenyl, triphenyl phosphonium bromide or tetraphenyl borate)] were found to be different in physical appearance(hard and strong) and tougher than the starting material, the Exxpro elastomer. The mechanical properties of these quaternary phosphonium... 

Tetraphenyl-1,2-ethanediol Tetraphenylethylene glycol. See Benzopinacol Tetraphenyl phosphonium bromide CAS 2751-90-8 EINECS/ELINCS 220-393-4 Classification Phosphonium salt Empirical C24H2oBrP... 

Benzyl trimethyl ammonium hydroxide Cetrimonium bromide Dimethyl diallyl ammonium chloride Laurtrimonium bromide Laurtrimonium chloride Methyl tributyl ammonium chloride Tetrabutyl ammonium bromide Tetrabutyl ammonium chloride Tetrabutyl ammonium fluoride Tetra-n-butyl ammonium hydrogen sulfate Tetra-n-butyl ammonium hydroxide Tetrabutyl ammonium iodide Tetrabutylphosphonium acetate, monoacetic acid Tetrabutylphosphonium bromide Tetrabutylphosphonium chloride Tetraethylammonium bromide Tetraethylammonium hydroxide Tetrakis (hydroxymethyl) phosphonium chloride Tetramethylammonium bromide Tetramethylammonium chloride Tetramethylammonium hydroxide Tetramethyl ammonium iodide Tetraphenyl phosphonium bromide Tetrapropyl ammonium bromide Tetrapropyl ammonium iodide Tributylamine Tributyl phosphine Tributyl (tetradecyl) phosphonium chloride Trioctyl (octadecyl) phosphonium iodide catalyst, phase-transfer Tetraethylammonium chloride Tetraoctylphosphonium bromide Tri-n-butyl methyl ammonium chloride Tri methyl phenyl ammonium hydroxide catalyst, phenolics Triethylamine... 

Tetraphenyl phosphonium bromide C24H2oN2Na208S2 Acid blue 230 C24H20O6... 

In this technique, two types of reactants are placed separately in two immiscible solvents, one of which is water. Polymerisation takes place at the interface in the presence or absence of a phase transfer catalyst (PTC) such cetyl tributyl ammonium bromide (CTAB), benzyl dimethyl hexadecyl ammonium chloride (BDMHDAC), tetramethyl ammonium bromide or tetraphenyl phosphonium bromide. This process is carried out by agitation or under static conditions. This technique is effective for condensation polymers or for the formation of polyaniline nanofibre. The advantages of the interfacial polymerisation technique include the use of simple equipment, nfild reaction conditions and flexibility in the ratio or purity of reac-... 

A report by ScammeUs demonstrated the susceptibility of the 6-chloropurine position to TBAF-mediated displacement to yield an inseparable mixture of the 6-chloro and 6-fluoro purines [111]. Alternatively, a selection of 2-substituted (NH2, F or OH) 6-chloropurines were converted to the 6-fluoropurines (65-67) in moderate yield (56-69 %) using the HALEX conditions of KF in sulfolane with the phase transfer catalyst tetraphenyl phosphonium bromide (TPPB) [112] (Scheme 22). 

The following chemicals were used as received (from Aldrich unless otherwise noted) 2,6-diaminoanthraquinone, 2,5-dichloro-p-phenylenediamine, 2,6-diamino-5-nitropyrimidine, 2,3,5,6-tetra-methyl phenylenediamine, 2,6-diamino-8-purinol hemisulfate monohydrate, adenine (Chemalog Chemical Dynamics Corp.), 1,9-diamino-nonane, 4,4 -diaminodiphenyl sulfon (Fluka AG), 4,4 -methylene-dianiline, tetraphenyl phosphonium iodide, tetrabutyl ammonium iodide, tetramethyl ammonium bromide, dibenzo-l8-crown-6, 15-crown-5, triphenylantimony dichloride and triethylamine (Eastman Kodak Co.). 

Tetrabutyl Tetraphenyl Tetramethyl Ammonium Phosphonium Ammonium Iodide Iodide Bromide... 

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