Arsine, Ethyl

A. Preparation.—The first reverse Wittig olefin synthesis has been reported. Triphenylphosphine oxide and dicyanoacetylene at 160 °C gave the stable ylide (1 78%) the reaction was reversed at 300 °C. No comparable reaction was observed with a variety of other activated acetylenes but tri phenyl arsine oxide gave the corresponding stable arsoranes with dicyanoacetylene (— 70 °C), methyl propiolate, hexafluorobut-2-yne, dimethyl acetylene dicarboxylate, and ethyl phenylpropiolate (130 °C). 

Bis(trimethylsilyl)arsine reacts with diethyl- or dimethylzinc to form different arsenide complexes with the structure dependent on the steric demands of the alkyl group. In the presence of both methyl and ethyl groups alkylzinc bis(trimethylsilylarsenide) forms which has a trimeric solid state structure (37) with a six-membered Zn3As3 and Zn-As distances with an average of 2.48 A.322... 

In a study by Kensler et al. (1946), three monkeys were exposed by inhalation to arsine at a concentration of 0.45 mg/L (450 mg/m3 or 140 ppm) for 15 min. Although one monkey died in 24 h, one remaining monkey survived without treatment another was treated with 2,3-dimercaptopropyl ethyl ether. The surviving monkey that was not treated could "scarcely raise himself from the floor of his cage from the 2nd to the 7th days." The erythrocyte count of this monkey decreased to 65% of pre-treatment level in 24 h, and by d 3 1 decreased to approximately 20% prior to recovery. The monkey treated with... 

This type of reaction was originally carried out with ethyl iodide1 and has been extended to other alkyl halides,2 halogeno-carboxylic esters3 and to substituted arsine halides.4 Incidentally when p-toluene sulphonyl chloride and naphthalene-2-sulphonyl chloride were allowed to react with sodium diethyl phosphite, the corresponding disulphones were obtained in small yield.5... 

Domino-Heck Reactions-General Procedure 5.6 mg (25 pmol) of palladium(II) acetate and 55 pmol of the arsine ligand were dissolved in 3 ml of dry dimethyl formamide and the solution was stirred at 65°C (40°C for trimethylsilylacetylene) for 15 mitt Then, 127 mg (1.35 mmol) N-Benzoyl-2-azabicyclo[2.2.1]hept-5-en-3-one, 1 mmol of the aryl compound. Four hundred and eighty-eight microliters (3.50 mmol) of triethylamine, and 3.00 mmol of the phenylacetylene (or silylmethyl-acetylene) were added rapidly in one portion. The mixture was heated at the same temperature for 24 h. After cooling down to room temperature 50 ml of brine were added, the reaction mixture was extracted with ethyl acetate and dried over MgSO. The solvent was evaporated, the residue purified by column chromatography (n-Hexan-Ethyl acetate 4 1). 

Trivinylarsenic, Tris(vinyl)arsine TX-60, Methylphosphonothioic acid S-[2-[bis(l-methylethyl)amino]ethyl] o-ethyl ester... 

Calcium carbide desulfurization slag has a distinctive odor. Since pure acetylene is odorless, the odor must be produced by other trace constituents in the off-gases. A calcium carbide desulfurization slag sample from one ductile foundry was treated with water at a 1 1 solid-to-liquid ratio, and the gas was collected in a Tedlar bag for analysis by GC-MS. Several trace gases were identified, including arsine, divinyl sulfide (CHj-CH S, ethanethiol (ethyl mercaptan), methane, phosphine, and carbon monoxide. 

CHLOROPHENYL)-6-ETHYL-2,4-PYRIMIDINEDIAMINE see TGDOOO (m-CHLOROPHENYL)HYDROXY(P-HYDROXYPHENETHYL)ARSINE OXIDE see CKA575 (p-CHLOROPHENYL)HYDROXYMETHYLARSINE OXIDE see CKD800... 

C9H11AS02 allyl phenyl arsinic acid 21905-27-1 492.15 43.130 1,2 16930 C9H11N02 ethyl phenylcarbamate 101-99-5 510.15 44.860 2... 

Methyl dichloroarsine. Ethyl dichloroarsine. Chlorovinyl arsines. Phenyl dichloroarsine. Diphenyl chloroarsine. Diphenyl cyanoarsine. 

Of the ahphatic arsines, only ethyl dichloroarsine has been widely employed as a war gas and is considered as the typical substance for use in projectiles. Methyl dichloroarsine is classed by some German authors as a substance which was studied in the post-war period, but according to an American authority it was actually employed by the Allies towards the end of the war, though only in small quantity. ... 

For instance, dimethyl chloroarsine (b.p. 106 5° to 107° C.), dimethyl bromoarsine (b.p. 128° to 129° C.), dimethyl fluoro-arsine, methyl dicyanoarsine (m.p. 115 5° to ii6 5°C.), ethyl dibromoarsine, etc. All of these have aggressive properties inferior to those of methyl dichloroarsine. 

It may also be obtained by heating ethyl arsine in a closed tube with mercuric, arsenic, antimony or stannous chloride. ... 

TriaOcylarsine Oxides.—Only three compounds pf this type are known — the melliyl, ethyl, and n-propyl derivatives. The first two are formed by direct oxidation of the arsines by atmospheric oxygen, and the methyl compound also results when cacodyl oxide, (Me2As)20, in methyl alcohol solution is treated with methyl iodide and sodium hydroxide. The propyl derivative is formed when tetra- -propyl-arsonium hydroxide is heated in a stream of hydrogen. These oxides exhibit no add properties but are inclined to be feeWy basic, the ethyl compound yielding a nitrate, and the propyl compound a double compound with mercuric chloride. 

Trialkylarsine Sulphides.— Direct addition of sulphur and trialkyl-arsine takes place in the case of the ethyl compound, the product also resulting from the interaction of diethylarsine and carbon disulpMde at 120 C., or on heating ethylarsine disulphide at 195° C. Tri-methylarsine sulphide is obtained from dimethylarsine and liquid... 

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