Dimethyl arsin

AMA cacodyhc acid [75-60-5] ammonium methylarsonic acid dimethyl arsinic acid C2H2ASO2... 

The element symbols within each formula are arranged according to a modified Hill system in which the order is metal(s), C, H and then any remaining symbols arranged alphabetically. Compounds containing two (or more) different metals appear twice (or more), being listed under each metal. Common ligand abbreviations which appear in the text have also been used in the index. These include acac (acetylacetone), bipy (2,2 -bipyridyl), diars [o-phenylenebis(dimethyl-arsine)], dien (diethylenetriamine), etc. 

Concerning anthropogenic sources, methyl arsenic compounds such as methyl arsonic acid and dimethylarsinic acid have been used as herbicides, and were once a significant source of environmental residues. Dimethyl-arsinic acid (Agent Blue) was used as a defoliant during the Vietnam War. 

The first report of a heart-imaging agent in animals involved a 99mTc(IH) complex with 0-phenylenebis(dimethyl arsine) [30], Several other bidentate /[-acceptor ligands were investigated and early studies focused on a prototype... 

Caution. The arsenic compounds used here are extremely toxic and must be handled only in an efficient hood. Dimethyl-arsine is particularly dangerous because of its volatility (b.p. 36°/760 mm.) and its spontaneous flammability. 

The results show that good recoveries were obtained from artificial seawaters, even at the 0—05 xg/l level, but for natural seawater samples the recoveries were lower (74-85%). This effect could be attributed to organic sample components that eluted from the column together with dimethyl arsinate. 

For this reason Long (7, 8) and Erskine 8—11) prepared two series of ligands the ortho, meta and para-styryl dimethyl arsines Long), and the o, m and -allylphenyldimethylarsines Erskine) and studied the bromination of these compounds, their methiodides and their platinum (II) and rhodium(III) complexes. 

A spectrophotometric technique showed that the isomeric vinyl phenyl dimethyl arsines reacted at similar rates in carbon tetrachloride solution, as did the isomeric allylphenyl dimethyl arsines 8). The bromination of the methiodides of the allyl compounds was studied to see if the presence of the positively charged group affected the reactivity of the... 

The rhodium(III) complexes of the isomeric st oryl dimethyl arsines were all of the type RhBrs (arsine) 3 and all reacted with an excess of bromine (> 6 mols) giving complexes of the t3 e RhBrs (arsine Br2)3, in which all the double bonds of the ligands have been saturated by addition of bromine. No difference in reactivity between any of the isomers was noted (5). 

Cell Culture As Mass spectrometry Identification of arsenate, arsenite, monomethyl-arsonate and dimethyl-arsinate 89)... 

The only recorded compound appears to be the complex with o-phenylenebis(dimethyl-arsine), PaCl5-xC6H4(AsMe2)2 (1 [Pg.1179]

Finally, particular chemical species can be determined in some cases, as when arsenic content is separated into As(III), As(V), monomethyl arsonic acid, and dimethyl arsinic acid using ion-exchange chromatography. Chemical speciation is sometimes possible but is often very difficult. If the metals... 

Hydroxidimethyl arsine oxide 10% DC- Electron capture 200 on GasChrom Q Hydroxy dimethyl arsine oxide converted to iododimethyl arsine, then GLC, 92.3% recovery [719]... 

For instance in the synthesis of dimethyl arsinic acid (cacodylic acid) trivalent arsenic is isomerised to the pentavalent state... 

Sorption of monomethyl arsonic acid (MMAA), dimethyl arsinic acid (DMAA), and arsenate on anaerobic bottom sediments from the Menominee River, Wisconsin are described by Langmuir Isotherms. These results were Incorporated Into a kinetic model of arsenic species transforamtlon which takes sorption Into account. Model predictions were found to be sensitive to the sediment water content and r, the adsorptive capacity of the sediment. Demethylatlon of MMAA and DMAA was observed In sediment Incubation experiments. The predictions of the sorption/kinetic model were In good agreement with the results of the Incubation experiments. 

Woolson, E.A., "Generation of dimethyl arsine from soil,"... 

DIMETHYL ARSINIC SULFIDE see DQG700 (PIMETHYLARSINO)OXY)SODIUM-As-OXIDE see HKC500... 

C2H6As2S2 dimethyl arsinic sulfide 13367-92-5 323.35 27.208 1,2 1169 C2H9BS borane-methyl sulfide complex 13292-87-0 317.15 26.635 1.2... 

Methyl dichloroarsine may also be obtained by treating dimethyl arsine with chlorine ... 

Dimethyl Arsine. With dimethyl arsine a white crystalline product, CgH5AsCl2.(CHa)jAsH, is formed, which is readily decomposed by the action of moisture. 

The major organic arsenic compound in the environment is dimethyl arsinate. Specific and sensitive methods for the determination of this compound are needed, since the direct atomic spectrometric method does not distinguish between different organoarsenic species... 

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