|
 |
review molybdenum tungsten heterometallic sulfido cluster; copper molybdenum sulfido cluster ESR review; iron molybdenum sulfido cubane cluster review; nickel molybdenum sulfido cubane cluster review; ethylene molybdenum tungsten heterometallic sulfido review; acetylene molybdenum sulfido oxo cluster review; carbon sulfur bond molybdenum cluster review; reactivity molybdenum heterometallic sulfido cluster review; transition metal sulfido cubane cluster review
In a review, with more than 38 refs., the authors describe their research on incomplete cubane-type clusters with M3S4 cores and cubane-type clusters with M3M'S4 cores which they characterized (M3 = Mo3, Mo2W, MoW2, W3; M' = metal). The clusters [M3NiS4(H2O)10]4+ take up ethylene to give [M3NiS4(C2H4)(H2O)9]4+: an increase in the no. of tungsten atoms results in the upfield chem. shift of ethylene-signal in the 1H-NMR spectra. The molybdenum-iron cluster [Mo3FeS4(H2O)10]4+ (Mo3Fe) does not react with ethylene. The formal oxidn. states of metals in Mo3Fe and [Mo3NiS4(H2O)10]4+ (Mo3Ni) are assigned as MoIVMoIII2M'II (M' = Fe, Ni). The oxygen/sulfur-bridged clusters [Mo3S4(H2O)9]4+ (Mo3) and [Mo3OS3(H2O)9]4+ (Mo3OS) react with acetylene to give clusters with carbon-sulfur bonds. The reactivities of Mo3Ni and Mo3 are interpreted by the electronic structures calcd. by the Discrete Variational (DV)-Xa method. EPR studies of the mixed-metal cluster with Mo3CuS44+ core are also described.
Research papers (academic journals)
