TRANSITION-METAL SUBSTITUTED PHOSPHINES, ARSINES AND STIBINES, .19. SYNTHESIS AND SOME PROPERTIES OF TRANSITION-METAL SUBSTITUTED ARSINE SULFIDES

The transition metal arsines C5H2(CO)2LM-As(CH3)2 (M = Mo, W; L = CO, P(CH3)3) react with elementary sulfur (selenium) in CS2 to give the transition metal substituted arsine chalcogenides CsH5(CO)2LM-As(CH3)2S(Se). Due to the pronounced basicity of the chalcogen centre they are easily converted into cationic mononuclear complexes [traws-C5H2(CO)2P(CH3)3Mo-As(CH3)2SR]⊕X⊖ by alkylhalides, and into bridged dinuclear complexes trans-C5H5(CO)2P(CH3)3Mo-As(CH3)2S-MLn on treatment with THF • Cr(CO)5or Agl. The structures of the new compounds are established by spectroscopic investigations. © 1979, Walter de Gruyter. All rights reserved.