Sulphur dioxide as an unsupported bridging ligand: synthesis and X-ray crystallographic characterization of µ-(sulphur dioxide)-bis-(π-cyclopentadienyldicarbonyliron)

Abstract

[π-C5H5Fe(CO)2]2SO2 has been prepared from π-C5H5Fe(CO)2Na and SO2 and its molecular stereochemistry determined from a single-crystal X-ray diffraction study; this complex represents the first known molecule in which SO2 alone bridges two transition metal atoms.