Basic Metal Complexes: Crystal Structures of Cyclopentadienylcobalt(I)-bis(trimethylphosphine) and Cyclopentadienylcobalt(I)-(trimethylphosphine)(ethylene)
The title complexes [(C5H5)Co(PMe3)2] 1 and [(C5H5)Co(PMe3)(C2H4)] 2b adopt the two-legged piano-stool molecular geometry, with a remarkably similar coordination geometry around the cobalt atom. The rather long carbon-carbon bond of the ethylene ligand in 2b underlines the pronounced donor properties of the PMe3 ligand, causing a highly basic site.
