Alkynethiolate ligands in the syntheses of iron carbonyl derivatives. Crystal structure of [(η5-C5H5)Fe(CO)2(SCCSiMe3)]

The complexes [(η5-C5H5)Fe(CO)2(SCCR)] (R=tBu, SiMe3) have been obtained by reaction of [(η5-C5H5)Fe(CO)2I] and the corresponding LiSCCR. These are the first examples of mononuclear iron compounds containing alkynethiolate ligands. The crystal structure of [(η5-C5H5)Fe(CO)2(SCCSiMe3)] has been determined by X-ray diffraction. The role of [(η5-C5H5)Fe(CO)2(SCCSiMe3)] as a metalloligand in its reactions with metal carbonyls has been explored.