Arsonium, tetraphenyl

SYNS ARSONIUM, TETRAPHENYL-, CHLORIDE TETRAPHENYLARSONIUM CHLORIDE... 

AsAgFsSi6, Arsenate, hexafluoro-, bis-(cycZo-octasulfur)silver(l -h), 24 74 AsBrsFgS, Arsenate, hexafluoro-, tribromo-sulfur(IV), 24 76 AsQH, Arsine, dimethyl-molybdenum complex, 25 169 AsCigHis, Arsine, triphenyl-chromium complexes, 23 38 ASC24H10, Arsonium, tetraphenyl-... 

The PFg ion can be determined by precipitation with nitron or tetraphenyl-arsonium chloride (69). 

Beck, W. and Noth, H. (1984) Rontgenstruktur von tetraphenylarsonium-tetraazidoaurat(III). Chemische Berichte, 117, 419 Beck, W., Klapotke, T.M., Kliifers, P., Kramer, G. and Rienacker, C.M. (2001) X-Ray crystal structures and quantum chemical calculations of tetraphenyl-arsonium tetraazidoaurate(III) and azido... 

Curve 1 in Fig. 5 gives an example of the oscillation of membrane current observed with the liquid membrane system as in Eq. (3) by applying a constant AFwi-w2 of —0.48 V and measuring the time course of the current through the LM, /wi-w2- The cell used was the same as that used for the measurement of the potential oscillation, except a tetraphenyl-arsonium ion selective electrode [26,27], TPhAsE, was employed as a reference electrode in LM of NB ... 

While the validity of these assumptions has been criticized, that adopted by A. J. Parker has received the widest acceptance, i.e. that tetraphenyl-arsonium tetraphenylborate (Ph4AsPh4B),... 

This procedure is generally unsatisfactory for tetraphenyl-arsonium salts because of coprecipitation of tetraphenylarsonium triiodide. 

Using the 2-pyridylazoresorcinol-tetraphenyl-arsonium chloride system a concentration of 1 pg/1 could be determined with relative standard deviation of 7%. 

Vanadium complexed with tetraphenyl-arsonium chloride and tetramethylene dithio-carbamate, extracted with chloroform... 

Suitable conditions for the quantitative polarographic determination of technetium as pertechnetate are given by Miller et al. who propose a 0.1 M KCl solution of pH 10 or a phosphate buffer solution of pH 7. Since in pH 7 buffer the current is directly proportional to the concentration of technetium over the range of 0.1 to 1.1 ppm, this medium has been used for the determination of low concentrations of technetium in solutions of fission products by the standard addition technique. The half-wave potential of the used wave is —0.68 V vs. SCE. The reaction appears to be irreversible (Fig. 13). It has been found that neither rhenium, ruthenium nor other fission products interfere. However, tetraphenyl-arsonium chloride is reduced at a more positive potential than is pertechnetate therefore, (QH5) AsCl, if present, must be separated. 

Through the presence of aromatic or pseudoaromatic groups in the molecule (tetraphenylborate and related derivatives, the tetraphenyl-arsonium ion, cationic triphenylmethane dyes, complexes of o-phenanthroline with divalent nickel or ion, where the hydrophobicity is increased by further substitution by a hydrophobic group on the pseudoaromatic nucleus). 

The trithiocarbonato complex anions [M(CS3)212 (M = Zn or Cd) have been isolated as their tetraphenyl-phosphonium and -arsonium salts.881 The trithiocarbonate is bidentate and forms four-membered chelate rings. 

Addition of the resulting solutions to ice-cold aqueous tetraphenyl-arsonium chloride caused rapid and nearly quantitative precipitation of colorless to tan solids, as shown by Eq. (7). These materials provided satisfactory elemental analyses for the compositions [Ph4As][H2M(CO)4] (M = Mn, Re). 

Several C-labelled tetraphenyl arsonium salts of Rh(III) containing complex anions have been synthesized to investigate, by the N.M.R. method, the mechanism of the rhodium/iodine-catalysed industrial carbonylation of methanol used for acetic acid manufacture. A revised catalytic cycle for the reaction has been proposed (equation... 

The results of this investigation indicate that the cyanosulphonate ion may be stable in acetonitrile, but several attempts to prepare the tetraphenyl-arsonium salt of the ion were unsuccessful. 

The tetraphenyl arsonium or phosphonium salts of DSIT-zincate (PPh4)2(ZnC3Ses)2 can be prepared in 13% overall yield by sodium metal reduction of carbondiselenide in organic solvents <90JCS(D)115>. This method is similar to the procedure used for the sulfur analogue. 

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