Darstellung und Charakterisierung des Zwitterions S2C—C(NMe2)2; eine übergangsmetallinduzierte C—C-Kopplung. Komplexchemie der Zwitterionen S2C—C(NR2)2 / Synthesis and Characterization of the Zwitter Ion S2C —C(NMe2)2; a Transition Metal Induced C —C Coupling. Complex Chemistry of the Zwitter Ions S2C —C(NR2)2

A transition metal induced C-C coupling by the reaction of W2(N(CH3)2)6, (4) and CS2 yielded the zwitter ion S2C-C(N(CH3)2)2 (1d) besides W2(N(CH3)2)2(CS2)2S4 (5). The com- plex chemistry of the zwitter ions 1d and S2CC(N(CH2)4X)2 (X = CH2, O) has been investigated by their reaction with (η5-C5H5)2Mo2(CO)4 (2) and (η5-C5H5)Mo(CO)3Cl (3). Reaction of the former led to complexes (η5-C5H5)Mo(CO)2(S2CR) (R = N(CH3)2, N(CH2)4X) and the new compounds [(η5-C5H5)Mo(CO)2(S2C-CR2)]+. X-ray structure analyses of 1d and ((η5-C5H5)Mo(CO)2(S2C-C(N(CH2)5)2)]⊕PF6⊖ (10b) are described.