Thermolysis of the μ3-imido cluster Ru3(μ3-NPh)(CO)10(1) gives formation of the novel hexaruthenium cluster Ru6(μ4-NPh)2(CO)15(2) in high yield. Cluster 2 has been crystallographically characterized: P21/c, a = 9.679 (3) Å, b = 22.638 (7) Å, c = 16.999 (6) Å, β = 96.03 (3)°, V = 3704 Å3, Z = 4, R = 0.031, and Rw= 0.042 for 5353 reflections with F0≥5σ(F0). The cluster has a distorted pentagonal-bipyramidal core with three Ru atoms and the two nitrogen atoms forming the pentagonal plane and two Ru atoms forming the axis of the pentagonal bipyramid. The remaining Ru atom is π-coordinated to the phenyl ring of one of the jLi4-NPh ligands and is also bonded to one of the Ru atoms in the cluster core. Cluster 2 can also be prepared from the reaction of Ru3(CO)12with Ru3(μ3-NPh)2(CO)9 in refluxing octane. A minor product of this reaction is the heptaruthenium cluster Ru7(μ4-NPh)2(CO)16(3), which also forms from reacting 2 with Ru3(CO)12. Spectroscopic data for 3 are consistent with a structure similar to that of 2, with the added Ru atom π-coordinated to the second imido phenyl group.
ASJC Scopus subject areas
- Physical and Theoretical Chemistry
- Organic Chemistry
- Inorganic Chemistry