907586-84-9Relevant academic research and scientific papers
Si-H bond activation by (Ph3P)2Pt(η2- C2H4) in dihydrosilicon tricycles that also contain O and N heteroatoms
Braddock-Wilking, Janet,Corey, Joyce Y.,French, Lisa M.,Choi, Eunwoo,Speedie, Victoria J.,Rutherford, Michael F.,Yao, Shu,Xu, Huan,Rath, Nigam P.
, p. 3974 - 3988 (2006)
Several tricyclic phenoxasilin and phenazasiline heterocycles were synthesized from the corresponding 2,2′-dilithio-diphenyl ether or diphenyl amine precursor and silicon tetrachloride (or trichlorosilane) followed by reduction with lithium aluminum hydride [H2SiAr2: Ar2 = C12H8O (1); Ar2 = C 14H12O (2); Ar2 = C13H11N (3); Ar2 = C15H15N (4); Ar2 = C13H9Br2N (5)]. The reactivity of hydrosilanes 1-5 with (Ph3P)2Pt(η2-C2H 4) (6) was investigated. At room temperature, mononuclear complexes, (Ph3P)2Pt(H)-(SiAr2H) and (Ph 3P)2Pt(SiAr2H)2, were generally observed by NMR spectroscopy but were too reactive or unstable to isolate. Dinuclear and in some cases trinuclear Pt-Si-containing complexes were observed as the major products from the reactions. Symmetrical dinuclear complexes, [(Ph3P)Pt(μ-η2-H-SiAr2)]2 (8 and 22, respectively), were produced from the reaction of 1 or 3 with 6. In contrast, reaction of silane 2 with 6 produced a trinuclear complex, [(Ph 3P)Pt(μ-SiAr2)]3 (16), as the major product. However, reaction of 4 or 5 with complex 6 produced an unsymmetrical dinuclear complex, [(Ph3P)2Pt(H)(μ-SiAr2)(μ- η2-H-SiAr2)Pt(PPh3)] (26 and 30, respectively), as the major component. The molecular structures of a symmetrical (22) and unsymmetrical dinuclear (30) complex as well as a trinuclear (16) complex were determined by X-ray crystallography.
