Binuclear iron(I), ruthenium(I), and osmium(I) hexacarbonyl complexes containing a bridging benzene-1,2-dithiolate ligand. Synthesis, X-ray structures, protonation reactions, and EHMO calculations

摘要

The dithiolate-bridged complexes [M-2(mu-bdt)(CO)(6)] (M = Fe (1), Ru (2), Os (3); bdt = benzene-1,2-dithiolate) have been prepared. X-ray diffraction studies have revealed that although the three compounds have analogous molecular structures their crystal structures are different as a result of different molecular packings. Complex 1 does not react with tetrafluoroboric acid in 1,2-dichloroethane, while compounds 2 and 3, under the same conditions, undergo protonation at the metal atoms to give the cationic hydride derivatives [M-2(mu-H)(mu-bdt)(CO)(6)][BF4] (M = Ru, Os). EHMO calculations have been used to rationalize the results of the protonation reactions. [References: 44]