Arsine, Methyl

See Chlorine Dichloro(methyl)arsine See Other ALKYLNON-METAL HALIDES... 

Chlorine, Chlorinated pyridine, Iron powder, 4047 Chlorine, Dichloro(methyl)arsine, 4047... 

The structure of [Ni(ttas)X2] [ttas = bis-(o-dimethylarsinophenyl)methyl-arsine, X = Cl, Br, I, or SCN] is very sensitive to the nature of X and the solvent. Five-co-ordinate monomers are favoured in polar solvents, whereas hydroxylic solvents favour disproportionation to [Ni(ttas)2] and either NiX - or its solvolysis products. The co-ordination geometry of [Ni(ttas)2Y2] (Y = CIO4, NO3, or I) is not certain. ... 

McAuliffe and co-workers and Dyer and Meek studied nickel(II) complexes with ligands containing methylated arsines Sbtas (XLVII), Bitas (XLVIII) and either thiomethyl or selenomethyl groups Pts (IL) and Ptse (L).1406-1410 The two ligands Pts and Ptse give complexes with different stoichiometry and coordination geometry. 

Perhaps as much as 26 200 t of arsenic may annually volatilize into the atmosphere from soils (Matschullat, 2000), 300-301. Much of this volatilization is due to microbial activity (Frankenberger and Arshad, 2002), 363-364. Under reducing conditions in soils, fungi and other microorganisms may produce gaseous arsine and methylated arsines, such as methylarsine, dimethylarsine and trimethylarsine ((Mandal and Suzuki, 2002), 205 (Lrankenberger and Arshad, 2002), 363 (Oremland and Stolz, 2003), 939 Chapter 4). 

Nitromethane See Nitromethane Alkylmetal halides See other ALKYLALUMINIUM HALIDES 0423. Dichloromethylarsine [593-89-5] a / Cl Chlorine See Chlorine Dichloro(methyl)arsine See Other ALKYLNON-METAL HALIDES CH3AsC12... 

Dichloro (methyl) arsine. Sealed ampoules of a mixture of the arsine with chlorine exploded below 0°C.n... 

The methylation of As(III) has been observed in a number of organisms, including humans. For example, higher eukaryotes and bacteria have been reported to produce monomethylarsine or dimethylarsine, fungi which produce trimethylarsine (Bentley and Chasteen, 2002 Dombrowski et al, 2005), and methanogens and aerobic eubacteria which produce methylated arsines (Honschopp et al, 1996). 

Cornybacterium sp., Escherichia coli, Flavobacterium sp., Proteus sp., waA Pseudomonas sp. transform arsenate to arsenite, and they all produee dimethylarsine, whereas Pseudomonas sp. forms all three of the methylated arsines from arsenie-eontaining pestieides (Shariatpanahi et al, 1981). Six baeterial speeies Achromobacter sp., Aero-monas sp., Alcaligenes sp., Flavobacterium sp., Nocardia sp., and Pseudomonas sp.) produee both mono and dimethylarsine from methylarsonate and only two of them produee trimethylarsine, whereas Nocardia sp. was the only organism to produee all of the methylarsines from arsenical herbicides (Shariatpanahi et al, 1983). 

In dry ether solution, methyl dichloroarsine does not react with magnesium, though in presence of water the reaction is violent methyl arsine, hydrogen, methane and a compound, (CH3As),j, are formed. Zinc reacts similarly. ... 

Methyl arsine oxide is finally converted to methyldichloraraine by pa.ssing hydrogen chloride gas through the mixture, when the following reaction takes place ... 

Arsine itself and methyl arsines have different responses in colorimetric versus atomic absorption methods of analysis. The colorimetric AgDDC method is much more respon-... 

The pharmaceutical sodium methyl arsinate has been determined by non-aqueous titration with mercury(II) acetate -... 

The majority of natural and man-produced arsenic in seawater is present as inorganic forms. Arsenic is susceptible to methylation by microorganisms forming volatile methylated arsines and nonvolatile organoarsenic acids, with subsequent release to the water. Marine organisms can accumulate arsenic by direct water contact and ingestion of food. 

The third group of As species in natural freshwaters are the methylated arsenic species. Arsenic can be methylated by bacteria, algae and fungi to form gaseous mono-, di- and tri-methyl arsine (CH3) As) (Baker et al., 1983 Cullen and Reimer, 1989 Maeda et al, 1987), which dissolve in water forming the methylarsenic oxyacids, monomethylarsonic acid (MMAA) and... 

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