Darstellung und Charakterisierung eines Technetium-Butadien-Komplexes; Röntgenstrukturanalyse von [Tc2(CO)8][μ-C4H6]

(4). Tc2(CO)10 has been photolyzed in the presence o f butadiene at - 20 °C in pentane. Under these conditions the only product which could be characterized is the complex [Tc2(CO)8][μ-C4H6] The X -ray structure determination shows that 1 is isomorphous with the homologues species [M2(CO)8][μ-C4H6] (M = Mn, Re) with the trans-butadiene ligand bridging the two technetium centers. 4 is compared to the manganese (5) and rhenium species (6 ).