Selective formation of a triangulo-irondiplatinum cluster

• Autor(a) principal: Ursini,Cleber V.
• Data de Publicação: 1997
• Outros Autores: Dias,Gilson H.M., Gambardella,Maria T.P., Santos,Regina H. A.
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Journal of the Brazilian Chemical Society (Online)
• Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50531997000500005
• topic: trinuclear irondiplatinum cluster; ligand transfer

The trinuclear platinum cluster Pt3(m-CNBu t)3(CNBu t)3 reacts selectively with the monodentate dppm-iron complex Fe(dppm-P)(CO)4 (1:1 or 2:1 ratios of Pt:Fe) dppm = bis(diphenylphosphino)methane, to give the mixed-metal cluster FePt2(m-dppm)(CNBu t)2(CO)4. A single-crystal X-ray diffraction study established the structure of an isosceles triangular FePt2 core with short Pt-Pt 2.5756(5) Å, Fe-Pt(1) 2.559(2) Å and Fe-Pt(2) 2.565(3) Å bond lengths, and with the two platinum atoms bridged by the dppm ligand. Cell data: monoclinic, P2(1)/n, a = 11.031(1) Å, b = 20.593(3) Å, c = 18.129(2) Å, b = 91.32(1) °, Dc (Z = 4) = 1.789 mg m-3. Least-squares refinement based on 4171 reflections converged to a final R = 0.0508 and Rw = 0.0558. The IR and NMR spectra (¹H, 13C-{¹H}, 31P-{¹H}, and 195Pt-{¹H}) of the cluster are also reported and discussed.