Intramolecular coupling reaction of phosphino–thioenolato iron(II) complexes with alkynes. Crystal structure of [Fe{η3-Ph2P–CHC(But)S–CCHPh}(CO)(PMe3)2]BF4

Abstract

[FeCl{η2-Ph2PCHC(R)S}(PMe3)(CO)(L)] complexes, prepared by ligand substitution, react with phenylacetylene in the presence of AgBF4 or NaPF6 and lead to carbon–sulphur bond formation between the β-phosphino–thioenolate ligand and the phenylvinylidene–iron intermediate, as shown by X-ray diffraction analysis.