Reactions of dinuclear and polynuclear complexes XV. Reinvestigation of the reaction between [CpMo(CO) 3H], allyl chloride and dimethyl disulfide Crystal structure of [(C5H5) Mo(CO)(μ-SMe) 3Mo(CO) 2(μ-SMe) Mo(CO) 2(C5H5)]
Résumé
The thermal reaction of [C5H5Mo(CO)3H] with dimethyl disulfide and allyl chloride has been reinvestigated. In addition to the expected cationic species [(C5H5)2Mo2(μ-SMe)3(CO)2]Cl (1), the new trinuclear complex [(C5H5)Mo(CO)(μ-SMe)3Mo(CO)2(μ- SMe)Mo(CO)2(C5H5)] (2) was obtained. An X-ray diffraction study showed that 2 contains a (C5H5)(CO)Mo(μ-SMe)3Mo(CO)2 core in which the triply bridged Mo-Mo bond is of normal length (2.800(1) Å). This core is linked to the C5H5Mo(CO)2SMe unit via its sulfur atom and through an unusually weak Mo-Mo bond of 3.115(2) Å, the Mo-Mo-Mo angle being 144.5(1)°.