Cycloheptatriene: a new versatile co-ordination ligand. Synthesis and structural characterization of [Ru6C(CO)(17)] derivatives

摘要

The reaction of [Ru6C(CO)(17)] and cycloheptatriene (CHT) gives rise to the formation of several products which have been fully characterized in solution and by single-crystal X-ray diffraction as [Ru6C(CO)(15)(ENBD)] 1 (ENBD = ethylenenorbornadiene), [Ru6C(CO)(14)(C7H8)] 2 and [Ru6C(CO)(11)(eta(5)-C7H9)(mu(3)-eta(2):eta(2):eta(3)C(7)H(7))] 3. Compounds 2 and 3 provide an example of the co-ordinative variability of carbocyclic rings based on the C-7-frame. The ligand in 1 contains nine carbon atoms and is formed from C7H9 by an unknown process. The CHT molecule has also been observed to convert to toluene through a ring contraction activated by the cluster to form the known compound [Ru6C(CO)(14)(eta(6)-C6H5CH3)] 4. [References: 20]