Tetracobalt Complexes with Co3 Face-Capping Cycloheptatrienyl and Cyclooctatetraene Ligands

Abstract

The novel tetracobalt cluster complexes 1 and 2, which contain facial CnHn ligands, have been synthesized and their crystal structures determined. The apical C8H8 ligand can be selectively substituted by a number of other ligands. In the solid state, the hydrogen atoms of the cycloheptatrienyl and cyclooctatetraene ligands take part in intra- and intermolecular hydrogen-bonding interactions of the C−H⋅⋅⋅O type.