Oxo ligands as assembling units in mixed-metal cluster chemistry: synthesis and X-ray structure of the bow-tie cluster [Mo2Ru3(μ-O)2(μ3-CPh)(μ-C3Ph3)(CO)8(η-C5H5)2]
摘要:
The thermal reaction of [Mo-2(O)(mu-O)(mu-C4Ph4)(eta-C5H5)(2)] with [Ru-3(CO)(12)] gives the pentanuclear cluster [Mo2Ru3(mu(3)-O)(2)(mu(3)-CPh)(mu-C3Ph3)(CO)(8)(eta-C5H5)(2)], which has been crystallographically characterised. The compound displays several unusual features: (i) a highly distorted bow-tie structure in which the two metal triangles are virtually perpendicular; (ii) the cleavage of the initial four carbon chain into a dimetalla-allyl fragment and an alkylidyne group; (iii) the presence of two triply-bridging oxo ligands; and (iv) the coordination of one of the phenyl groups of the C3Ph3 ligand to ruthenium.