Abstract
The methylation reaction of (C 5Me 5) 2Mo 2(μ-S 2)(μ-S) 2 (Ia) leads to two isomers of composition (C 5Me 5) 2Mo 2(SMe) 2S 2 (IV and IVb) which were separated by column chromatography. As an intermediate product of this reaction the iodine-containing adduct (C 5Me 5) 2Mo 2S 4I 2 is formed. All compounds were investigated by means of 1H and 95Mo NMR spectroscopy as well as by an X-ray structure analysis in the case of IVa. Thus, the SCH 3 ligands in IV are found to be arranged in a trans position. As a further result a cleavage of the η 2-disulfur bridge, originally present in Ia, has been found to occur in the second step of the reaction sequence.
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