Microdeterminazione dell'arsenico in composti metallorganici con il metodo di Schöniger

A method is described which allows the determination of arsenic in organometallic compounds following decomposition by the oxygen flask. Benzoyl peroxide is employed as a oxidizing aid in the combustion and also it prevents the formation of platinum-arsenic alioys. The combustion products are absorbed in a dilute iodine solution to ensure cornpìete oxi dation to As(V). The final determination of arsenic is performed by spec trophotometric determination of the arseno-molybdenum complex for med by treatrnent with an ammonium rnolybdate solution followed by reduetion with hydrazine sulphate. The proposed micro method is simple, rapid, and highiy reproducibile

Reazioni dell'uranile con etiluretano

The coordinative behaviour of ethylurethane (EU) towards uranyl in the presence of various anionic ligands has been investigated. The neutral compounds $[UO_2(NO_3)_2(EU)_2]$, $[UO_2(tropolonate)_2EU]$, $[UO_2(acetate)(OH)EU]_2$, $[UO_2(oxalate)EU]_n$ $[UO_2(phtalate)EU]_n$ have been prepared and characterized by elemental analysis, I.R., n.m.r. and molecular weight measurements. Structural interpretations are reported on the basis of the physical and chemical measurements

Complessi del Ni^I^I con 1,8-naftalenebis (dimetilarsina)

Complexes of 1,8-naphthalene-bis(dimethylarsine) (Nas) with Ni^I^I of the type $Ni(Nas)_2X_2 (X=Cl_4-, NO_3-)$ are reported. The complexes exist in two different form: one orange and the other blu. The compounds are formulated as: i) $[Ni(Nas)_2]X_2$, orange, and ii) $[Ni(Nas)_2X]X$ blu. on the basis of conductivity data and electronic spectra