Diarsines reactions

An alternative preparative route to R2QER acid esters (Q = P, As, Sb, Bi E = S, Se, Te) of interest due to its generally applicability to all the heavier group 15 and 16 elements, is the dismutation reaction between diorganodichalco-genides and tetraorgano-diphosphines, -diarsines, -distibines or -dibismuthines (Equation 17).2... 

In sharp contrast to the intensely studied reactions of dipenteles with transition metal compounds, reactions with group 13 metal compounds are almost unknown. Only two diphosphine-borane bisadducts of Type C ([H3B]2[Me4P2], [H2(Br)B]2[Me4P2]) have been synthesized and structurally characterized65 but no diarsine, distibine or dibismuthine adducts. We, therefore, became interested in the synthesis of such compounds, focusing... 

If the dichloro adduct of 1-methylarsenane is heated it loses methyl chloride with the formation of 1-chloroarsenane (77) (32CB409). The dibromo adduct reacts similarly (16BSF151,16BSF290). 1-Chloroarsenane can be reduced to the parent arsenane (78) using the reaction conditions shown in Scheme 16. This compound is readily oxidized in air to the arsenic acid (79) (57ZN(B)135). This arsenic acid is also formed from the oxidation of the 1,1-diarsine oxide (80) (34CB730). 

A variety of small molecules insert into the metal-metal bond of Pd2(dpm)2X2 via Reaction 1. The diarsine analog Pd2(dam)2Cl2, formed from bis(diphenylarsino)methane (dam), reacts similarly. The prod-... 

An analogous cation has been isolated for the diarsine derivative, namely [W(CO)4(diars)I]+ (181). The reaction of stannic bromide with Mo(CO)4 (diars) [and W(CO)4(diars)] appears to proceed in a similar way, so that an unstable mixed metal cation [Mo(CO)4(diars)SnBr3]+Br3 is produced, which decomposes to (diars)Mo(CO)2Br3 (179). 

When primary arsines are reacted with (MeAs)5, the respective cyclopolyarsine (RAs) is prepared in high yield (eqnation 118). Also the reaction of primary arsines with aminoarsines and diarsines generates cyclopolyarsines. 

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