Nature 344, 526 - 528 (05 April 1990); doi:10.1038/344526a0

A tri-platinum complex containing a coordinatively naked platinum atom

T. Tanase^*, Y. Kudo^*, M. Ohno^*, K. Kobayashi^† & Y. Yamamoto^*

^*Department of Chemistry, Faculty of Science, Toho University, Funabashi-shi, Chiba 274, Japan
^†Institute of Physical and Chemical Research (RIKEN), Wako-shi, Saitama 351, Japan

POLYNUCLEAR clusters of platinum and palladium containing metal–metal bonds may serve as models of the surface of heterogeneous catalysts, and their reactions may mimic those on such surfaces^1,2. Ligand-free metal clusters can be created in an ultradispersed condensed phase³, but they are difficult to isolate and characterize because of their high reactivities. Here we report the preparation of a tri-platinum diphosphine complex that con-tains a coordinatively 'naked' platinum atom. The metal cluster in this complex is electron-deficient relative to other tri-platinum complexes. Bonding of ligands to the naked platinum could reflect that of chemisorbed species on catalytic platinum surfaces.

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