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Keywords:

  • cluster compounds;
  • electron-localizability indicator;
  • metal–metal interactions;
  • rare earths;
  • transition metals
Thumbnail image of graphical abstract

The first examples of ternary rare-earth transition-metal polyhydride clusters (such as depicted) are reported by F. R. Wagner, R. Kempe, and T. Bauer in their Communication on page 8732 ff. Cluster formation proceeds through C[BOND]H bond activation of the Cp ligands that stabilize the transition-metal-containing starting material. Analysis of the electronic structure of the polyhydride cluster compounds revealed covalent Re[BOND]Lu bonding and ionic transition metal hydride–Lu interactions.