Artículos de revistas
Selective formation of a triangulo-irondiplatinum cluster
Registro en:
Journal Of The Brazilian Chemical Society. Soc Brasileira Quimica, v. 8, n. 5, n. 451, n. 457, 1997.
0103-5053
WOS:000071640400005
Autor
Ursini, CV
Dias, GHM
Gambardella, MTP
Santos, RHA
Institución
Resumen
The trinuclear platinum cluster [Pt-3(mu-CNBut)(3)(CNBut)(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(mu-dppm)(CNBut)(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) Angstrom], Fe-Pt(1) [2.559(2) Angstrom] and Fe-Pt(2) [2.565(3) Angstrom] bond lengths, and with the two platinum atoms bridged by the dppm ligand. Cell data: monoclinic, P2(1)/n, a = 11.031(1) Angstrom, b = 20.593(3) Angstrom, c = 18.129(2) Angstrom, beta = 91.32(1) degrees, D-c (Z = 4) = 1.789 mg m(-3). Least-squares refinement based on 4171 reflections converged to a final R = 0.0508 and R-w = 0.0558. The IR and NMR spectra (H-1, C-13-{H-1}, P-31-{H-1}, and Pt-195-{H-1}) of the cluster are also reported and discussed. 8 5 451 457