Übergangsmetall-substituierte Phosphane, Arsane und Slibane, XXIV [1] Funktionelle Arsanliganden durch Reaktion von Übergangsmetalldimethylarsinsulfiden mit Aeetylhalogenid [2] / Transition Metal Substituted Phosphanes, Arsanes and Stibanes, XXIV [1] Functional Arsane Ligands via Reaction of Transition Metal-Dimethylarsinesulfides with Acetylhalide [2]

Abstract

<jats:title>Abstract</jats:title><jats:p> The interaction of the transition metal dimethylarsine sulfides Cp(CO)<jats:sub>2</jats:sub>PMe<jats:sub>3</jats:sub>M-As(S)Me<jats:sub>2</jats:sub> (M = Mo, W) with acetylhalides yields cationic complexes bearing the Me<jats:sub>2</jats:sub>AsSC(O)Me or Me<jats:sub>2</jats:sub>AsCl(Br) ligand, respectively. In a first step, the salt [Cp(CO)<jats:sub>2</jats:sub>PMe<jats:sub>3</jats:sub>M-AsMe<jats:sub>2</jats:sub>SC(O)Me]<jats:sup>⊕</jats:sup>X<jats:sup>⊖ </jats:sup>1a-c (X = Cl, Br) is formed, which is converted by a second mole MeC(O)X into salts [Cp(CO)<jats:sub>2</jats:sub>PMe<jats:sub>3</jats:sub>M-AsMe<jats:sub>2</jats:sub>X]<jats:sup>⊕</jats:sup>X<jats:sup>⊖</jats:sup> 2a-c, with (Me<jats:sub>2</jats:sub>CO)<jats:sub>2</jats:sub>S elimination. The brominated complex 2b can also be obtained by the addition of Br<jats:sub>2</jats:sub> to Cp(CO)<jats:sub>2</jats:sub>PMe<jats:sub>3</jats:sub>W-AsMe<jats:sub>2</jats:sub>. The composition and structure of the ionic dihalogen adducts are established by NMR and IR data and by conductivity measurements.</jats:p>