Synthesis and X-ray crystal structure of the cluster [Os6(CO)17{P(OMe)3}4], an example of a hexa-metal planar complex

The cluster [Os6(CO)17{P(OMe)3}4] has been obtained by the reaction of [Os6(CO)20] with P(OMe)3; the six Os atoms are approximately coplanar with the central Os3 triangle having each edge bridged by an Os atom.