Arsines triphenylarsine

Arsines. Triphenylarsine added portionwise at —75° to a soln. of Na in liq. NH3, then 1,2-dichlorethane in an equal volume of ether added 1,2-... 

Trialkyl- and triarylarsine sulfides have been prepared by several different methods. The reaction of sulfur with a tertiary arsine, with or without a solvent, gives the sulfides in almost quantitative yields. Another method involves the reaction of hydrogen sulfide with a tertiary arsine oxide, hydroxyhahde, or dihaloarsorane. X-ray diffraction studies of triphenylarsine sulfide [3937-40-4], C gH AsS, show the arsenic to be tetrahedral the arsenic—sulfur bond is a tme double bond (137). Triphenylarsine sulfide and trimethylarsine sulfide [38859-90-4], C H AsS, form a number of coordination compounds with salts of transition elements (138,139). Both trialkyl- and triarylarsine selenides have been reported. The trialkyl compounds have been prepared by refluxing trialkylarsines with selenium powder (140). The preparation of triphenylarsine selenide [65374-39-2], C gH AsSe, from dichlorotriphenylarsorane and hydrogen selenide has been reported (141), but other workers could not dupHcate this work (140). 

Silver(l) oxide Silver oxide (8) Silver oxide (Ag20) (9) (20667-12-3) Triphenylarsine Arsine, triphenyl- (8,9) (603-32-7)... 

AsFe04C 2H]5, Iron, tetracarbonyl-(triphenylarsine)-, 26 61 As2C Hu, Arsine, 1,2-phenylenebis-(dimethyl)-gold complex, 26 89 As4Au2F,( C,2H1 , Gold(I), bis[ 1,2-... 

Silver salts of triphenylarsine and triphenylstibine have also been prepared. When silver trifluoroacetate was added to a methanol-water solution of triphenylarsine, a change due to complexation was observed in the UV spectrum. The trifluoroacetate was assumed to be completely dissociated and a 1 1 complex with the arsine formed. The stability constant at 25 °C was determined as log / i = 5.7-5.8.203... 

A facile method for the preparation of a variety of stabilized arsonium ylides in good yield has been developed by the action of active methylene compounds with tertiary arsine oxide or tertiary arsine dihalide. Thus triphenyl-arsine dihalides react with a number of active methylene compounds in the presence of a tertiary amine to afford arsonium ylides (6) (40). The reaction of triphenylarsine oxide with active methylene compounds in the presence of either acetic anhydride or triethylamine-phos-phorus pentoxide gave rise to arsonium ylides (6) (32, 36. 65, 67). 

Arsonium ylides have also been prepared from the decomposition of diazonium compounds in the presence of a tertiary arsine. Thus tet-raphenylcyclopentadiene triphenylarsorane (13) was obtained by heating diazotetraphenylcyclopentadiene at its melting point in the presence of triphenylarsine (66). 

Reaction of benzylidene triphenylarsorane with aromatic aldehydes in alcohol afforded either arsine oxide and olefin or arsine and oxirane (97). Thus, from nitro- (58, 59, 97) or cyanobenzylidene derivatives (97) and aromatic aldehydes, trans-substituted oxiranes were obtained in 50-90% yield (97). Similarly, methylene triphenylarsorane reacted with benzal-dehyde in alcoholic solution to give triphenylarsine and phenyloxirane (49) in 87% yield (97). 

The gas-phase dipole moment of arsabenzene was found to be 1.10D 45). In cyclohexane solution it was measured as 1.02D27). These values are typical of those found for tertiary arsines for trimethylarsine p = 0.86D76), for triethylarsine p = 1.04D77) and for triphenylarsine p = 1.23D78). No dipole moment data are available for stibabenzene and bismabenzene. However, based on trends shown in acyclic compounds 79), it is expected that they have smaller moments. 

Fn = COOMe, COMe, CHO, CN, N02, OMe Scheme 9. Pd-catalyzed arsination of aryltriflates with triphenylarsine [29]. 

A mixture of fig. (0.0 Ifi mol) of triphenylarsine and 2 g. (0.004 mol) of triiron dodecacarbonyl (synthesis 4fi) is either refluxed in 150 ml. of tetrahydrofuran or heated at 80 to 90° in dioxane in an atmosphere of nitrogen for 45 minutes. The mixture is then cooled and filtered. The residue is rejected. It contains very little product, inasmuch as the arsine complexes are more soluble than the... 

Dichlorotetracarbonyldirhodium reacts readily with phosphines and arsines to form the four-coordinate phosphine or arsine carbonyl chlorides. - The complexes may also be prepared by refluxing rhodium (III) chloride 3-hydrate with a large excess of triphenylphosphine or triphenylarsine in 2-methoxyethanol. ... 

Chlorocarbonylbis(triphenylphosphine)rhodium and chlorocarbonylbis(triphenylarsine)rhodium form bright yellow crystalline solids which are readily soluble in chloroform and dichloromethane, moderately soluble in benzene and carbon tetrachloride, and sparingly soluble in ether and aliphatic hydrocarbons. The phosphine complex (m.p. 195 to 197°) and the arsine complex (m.p. 242 to 244°) are reported to have carbonyl stretching frequencies (using KBr disks) at 1960 and 1963 cm., respectively. ... 

Benzyl- or cinnamyl-triphenylarsonium bromides, upon reaction with aqueous sodium hydroxide at 100 °C, decompose into triphenylarsine oxide and toluene or 2-methyl-styrene, respectively . Since tertiary arsine oxides spontaneously racemize in water , alkaline hydrolysis of arsonium salts of this type cannot be used for the preparation of optically active arsines. 

Relatedly, despite the synthesis and structural characterization of numerous arsine and stibine oxides, bomb calorimetry measurements have only been reported on triphenylarsine oxide . While corresponding measurements have been made on triphenylarsine, it is clearly premature to make general observations as to E—O bond enthalpies in the absence of additional data. In principle, reaction calorimetry should prove useful. Indeed, we note a solution phase (benzene) enthalpy of reaction study of triphenylarsine and -butyl hydroperoxide according to the reaction... 

Stringer and Attrep compared hydrogen peroxide-sulphuric acid digestion and U.V. photodecomposition methods for the decomposition in water samples of triphenylarsine oxide, disodium methane-arsonate and DMAA to inorganic arsenic prior to reduction to arsine and determination by atomic absorption spectroscopy or by the AgDDC spec-trophotometric method . 

Similarly, the reaction of benzenediazonium chloride with sodium diphen-ylarsenite, (C6Hs)2AsONa, leads to triphenylarsine oxide, (CeHs)3AsO. Arsinic acids are obtained also as by-products in the Bechamp synthesis. For example, 4,4 -diaminodiphenylarsinic acid, along with a... 

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