Benzene in a new face-capping bonding mode: molecular structures of [Ru6C(CO)11(µ3-η2: η2:η2-C6H6)(η6-C6H6)] and [Os3(CO)9(µ3-η2: η2:η2-C6H6)]

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Abstract
A new co-ordination mode for benzene ligands in cluster complexes, in which the ring is symmetrically placed above a metal triangle has been crystallographically established in the carbonyl complexes [Ru6C(CO)11(µ3-η2: η2:η2-C6H6)(η6-C6H6)] and [Os3(CO)9(µ3-η2: η2:η2-C6H6)].