The new [Pt-13(CO)(12){Cd-5(mu-Br)(5)Br-2(dmf)(3)}(2)](2-) and [Pt-19(CO)(17){Cd-5(mu-Br)(5)Br-3(Me2CO2)}{Cd-5(mu-Br)(5)Br(Me2CO)(4)}](2-) clusters have been obtained in good yields by reaction of [Pt-12(CO)(24)](2-) with CdBr2 center dot H2O in dmf at 90 degrees C and structurally characterized by X-ray diffraction. Their structures consist of a Pt-centered Pt-13(CO)(12) icosahedron and a Pt-19(CO)(17) interpenetrated double icosahedron, respectively, decorated by two Cd-5(mu-Br)(5)Br5-x(solvent)(x) rings. Their surface decoration may be related to that of Au-Fe-CO clusters as well as to the staple motifs stabilizing gold-thiolates nanoclusters. An oversimplified and unifying approach to interpret their electron count is suggested.

Icosahedral Pt-Centered Pt13 and Pt19 Carbonyl Clusters Decorated by [Cd5(-Br)5Br5-x(solvent)x]x+ Rings Reminiscent of the Decoration of Au-Fe-CO and Au-Thiolates Nanoclusters: A Unifying Approach to Their Electron Counts

FEMONI, CRISTINA;IAPALUCCI, MARIA CARMELA;LONGONI, GIULIANO;ZACCHINI, STEFANO;
2011

Abstract

The new [Pt-13(CO)(12){Cd-5(mu-Br)(5)Br-2(dmf)(3)}(2)](2-) and [Pt-19(CO)(17){Cd-5(mu-Br)(5)Br-3(Me2CO2)}{Cd-5(mu-Br)(5)Br(Me2CO)(4)}](2-) clusters have been obtained in good yields by reaction of [Pt-12(CO)(24)](2-) with CdBr2 center dot H2O in dmf at 90 degrees C and structurally characterized by X-ray diffraction. Their structures consist of a Pt-centered Pt-13(CO)(12) icosahedron and a Pt-19(CO)(17) interpenetrated double icosahedron, respectively, decorated by two Cd-5(mu-Br)(5)Br5-x(solvent)(x) rings. Their surface decoration may be related to that of Au-Fe-CO clusters as well as to the staple motifs stabilizing gold-thiolates nanoclusters. An oversimplified and unifying approach to interpret their electron count is suggested.
C. Femoni; M. C. Iapalucci; G. Longoni; S. Zacchini; S. Zarra
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/103521
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