hydrogen atom is eliminated and the expected η5-(C5R5) complexes are formed. Reaction of Ru3(CO)12 with 2 leads to the binuclear η6-fulvene complex 8. The octahedral molybdenum complex9 and the square planar rhodium(I) complexes 10 and 11 which were obtained from Mo(CO)6 and [Rh(CO)2Cl]2, respectively, are rare examples of η2-(C5R5H) coordination to metal atoms.