Carbon-sulfur bond cleavage in CpRu(η5-thiophene)+ and subsequent reactions of the butadiene-thiolate product

Article abstract of DOI:10.1016/0022-328X(88)89037-5

The complexes CpRu(η⁵-Th)+ (1), where Th is thiophene or a methyl-substituted thiophene, react with hydrides such as H2Al(OCH2CH2OMe)2- to give (eq.3) the C-S cleaved butadiene-thiolate product 3.Subsequent reactions of 3 are shown: <*> This scheme is not intended to indicate that all reactions were performed on the thiophene complex; many were carried out using the methyl-substituted thiophene analogs.Structures of complexes of the types 6 and 9 were established by X-ray diffraction studies.Possible mechanisms for reaction 3 are considered, and stereochemistries of all complexes are established by 1 H NMR spectrometry.Implications for the mechanism of the catalytic hydrodesulfurization of thiophene are discussed.