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

Abstract The interaction of the transition metal dimethylarsine sulfides Cp(CO)2PMe3M-As(S)Me2 (M = Mo, W) with acetylhalides yields cationic complexes bearing the Me2AsSC(O)Me or Me2AsCl(Br) ligand, respectively. In a first step, the salt [Cp(CO)2PMe3M-AsMe2SC(O)Me]⊕X⊖ 1a-c (X = Cl, Br) is formed, which is converted by a second mole MeC(O)X into salts [Cp(CO)2PMe3M-AsMe2X]⊕X⊖ 2a-c, with (Me2CO)2S elimination. The brominated complex 2b can also be obtained by the addition of Br2 to Cp(CO)2PMe3W-AsMe2. The composition and structure of the ionic dihalogen adducts are established by NMR and IR data and by conductivity measurements.