132374-56-2Relevant academic research and scientific papers
Synthesis and structure of bimetallic allyl, alkoxysilyl complexes [Fe{Si(OMe)3}(CO)3(μ-dppm)M(η3-2-RC 3H4)] (M = Pd, Pt; R = H, Me) and of [Fe{μ-Si(OMe)2(OMe)}(CO)3(μdppm)Pd(SnPh 3)], a Sn-Pd-Fe-Si chain complex with a μ2-η2-SiO bridge
Braunstein, Pierre,Knorr, Michael,Piana, Hermann,Schubert, Ulrich
, p. 828 - 831 (2008/10/08)
The bimetallic allyl, alkoxysilyl complexes [Fe{Si(OMe)3}(CO)3(μ-dppm)M(η3-2-RC 3H4)] (M = Pd, R = Me, 2a; M = Pd, R = H, 2b; M = Pt, R = H, 3) have been prepared from the iron metalate [Fe{Si(OMe)3}-(CO)3(η1-dppm)]-, in which the dppm ligand helps in assembling and stabilizing the dinuclear unit. The crystal structure of 2a was determined by X-ray diffraction (Fe-Pd = 269.94 (7) pm). Reaction of 2a with HSnPh3 afforded [Fe{μ-Si(OMe)2(OMe)}(CO)3(μ-dppm)Pd(SnPh 3)] (4a), the first Sn-Pd-Fe-Si chain complex, in which the presence of an unusual μ2-η2-SiO bridge between the Fe and Pd atoms was established by X-ray diffraction (Fe-Pd = 266.55 (5), Sn-Pd = 259.50 (4), Pd-O(4) = 216.5 (2) pm). The lability of the O→Pd bond accounts for the dynamic behavior of the alkoxysilyl ligand, evidenced by variable-temperature 1H NMR spectroscopy, which renders the methoxy protons equivalent above 313 K (ΔG? ≈ 65 ± 2 kJ/mol).
