Cyclooctatetraenyl complexes of the early transition metals and lanthanides. 13. The first organolanthanide complex of the tripod ligand [(C5H5)Co{P(O)(OEt)(2)}(3)](-)

The reaction of [(eta(8)-C8H8)Sm(mu-Cl)(THF)](2) (1) with Na[(C5H5)Co{P(O)(OEt)(2)}(3)] (2) in a molar ratio of 1:2 in THF solution affords orange, crystalline (eta(8)-C8H8)Sm[(C5H5)Co-{P(O)(OEt)(2)}(3)] (3) as the first organolanthanide complex containing Klaui's tripod ligand. The compound has been fully characterized by elemental analysis and spectroscopic methods.