Tripyrrolylphosphine as a Unique Bridging Ligand in the Rh6(CO)14(μ2-P(NC4H4)3) Cluster: Structure, Bonding, Fluxionality, Thermodynamics, and Kinetics Studies

Tripyrrolylphosphine reacts with the cluster Rh6CO15(NCMe) to afford the disubstituted Rh6CO14(mu2)-P(NC4H4)3) derivative (2) via the Rh6CO15P(NC4H4)3 intermediate (1) with eta(1)-P coordination. In the solid state, 2 has the phosphine occupying a bridging position where it is bonded to two neighboring Rh atoms in the Rh(6) octahedron through the P-atom and an approximately tetrahedral alpha-carbon atom of one of the pyrrolyl rings. This can be …