ChemInform Abstract The title complex (II) is prepared as shown by reductive dimerization of (I), which is a new class of cluster condensation. (II) crystallizes in the space group R3 with Z=3 and has 20 cluster valence electrons. The cluster possesses a regular octahedral core of six Mo atoms. The cyclic voltammetry and coulometry in CH2Cl2 solution indicate reversible one-electron reduction and oxidation waves.

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Two triethylphosphine complexes of trinuclear molybdenum chlorosulfido clusters have been synthesized. Determination of the crystal structures have shown that they can be formulated as [Mo3(μ3-S)(μ-S)3Cl4(PEt3)n(MeOH)5−n] (n = 3, 4).