A rare example of a di-cationic hydrido carbonyl tetra-nuclear cluster, [H2Rh2Pt2(CO)(7)(PPh3)(3)](2+)

作者：Heaton Brian T^*; Iggo Jonathan A; Podkorytov Ivan S; Ponomarenko Vadim I; Selivanov Stanislav I; Tunik Sergey P

来源：Inorganica Chimica Acta, 2010, 363(3): 549-554.

DOI：10.1016/j.ica.2009.03.045

• Carbonyl clusters
• Hydride ligands
• Phosphane ligand site occupancy
• Structure elucidation
• NMR spectroscopy

Addition of excess CF3CO2H (HTFA) to [Rh2Pt2(CO)(7)(PPh3)(3)], I, under nitrogen results in the formation of a salt (X2+ Y-2), which contains only the second example of a di-cationic carbonyl hydride tetra-nuclear cluster, [H2Rh2Pt2(CO)(7)(PPh3)(3)](2+), X2+, and a presently partially characterized polymetallic anion Y-2 . The di-cation X2+ has been characterized by mass spectrometry and a variety of multinuclear NMR methods. Since there is no difference in the electron count for I and X2+, it is probable that both I and X2+ adopt similar butterfly metallic frameworks with a Rh-Rh hinge; in X2+, there are two bridging hydrides to the same wing-tip Pt but the phosphine site occupancies on the Rh2Pt2-framework in I and X2+ are different.

• 出版日期2010-2-15