Tetraphenylarsonium iodide

Tetraphenylarsonium iodide [7422-32-4] M 510.2. Crystd from MeOH. POISONOUS. 

Tetraphenylarsonium Phenyl(diiodo)tellurate(H) 0.5 g (1.25 mmol) of diphenyl ditclhirium are dissolved in 30 ml of warm acetonitrile, and a solution of 0.32 g (1.25 mmol) of iodine in 15 ml of acetonitrile followed by a solution of 1.28 g tetraphenylarsonium iodide in 30 ml of acetonitrile are added with vigorous stirring. The resultant solution is filtered, the filtrate is concentrated to a volume of 20 ml under vacuum, and the clear red concentrate is placed in a refrigerator overnight to allow the product to crystallize yield 1.86 g (88%) m.p. 174-176°. 

Tetraphenylarsonium salts of the hexaiodocomplexes (7) of thorium (IV) and uranium (IV), [Ph Asl MI, have also been obtained by crystallisation of the tetraiodide/methyl cyanide complexes with tetraphenylarsonium iodide in methyl cyanide solution in the absence of free iodine which, when present, precipitates as Ph4AsI. ... 

Figure 5. Effect of the supporting electrolyte cation in the nitrobenzene phase on the relationship between interfacial potential and dye iodide (DiOC2(3)1) concentration. A, 0.01 mol /L tetramethylammonium tetrapheny lb orate B, 0.01 mol/L tetraethylammonium tetrap heny lb orate C, 0.01 mol/L tetrabuty-lammonium tetrapheny lb orate D, two identical curves, 0.01 mol / L tetraphenylarsonium tetraphenylborate and 0.01 mol / L crystal violet tetraphenylborate. (The crystal violet has no supporting electrolyte in the nitrobenzene phase.) The supporting electrolyte in the water phase is always 0.01 mol/L LiCl, except for curve E, which has no supporting electrolytes.

Wittig and Clauss499 obtained pentaphenylarsenic by the action of phenyl lithium on triphenylarsine dichloride or tetraphenylarsonium bromide. The analogous reaction of methyllithium with trimethylarsine dibromide or tetra-methylarsonium iodide gave no isolable amount of pentamethylarsine, although the formation of small amounts of this product could be demonstrated among the others.500... 

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