When thienyl Schiff base
1 reacted withFe
2(CO)
9 under very mild conditions inbenzenethree major products were obtained: (1) a cyclometalated(
-
1:
2-thienyl;
1:
1(
N))hexacarbonyldiiron complex,
2, (2) a hexacarbonyldiironcomplex with an organic ligand,which is composed of two thienyl moieties derived from the originalthienyl imine and coupledtogether by a C-C bond,
3, and (3) a hydrogenation productof the original thienyl Schiffbase. Molecular structures of compounds
2b and
3a have been determined by single-crystalX-ray diffraction.