85553-01-1Relevant academic research and scientific papers
Addition of phenylacetylene to the mixed-chalcogenide compounds (CO)6Fe2(μ-SeTe), (CO)6Fe2(μ-SSe), and (CO)6Fe2(μ-STe). Structural characterization of (CO)6Fe2{μ-SeC(H)=C(Ph)Te}
Mathur, Pradeep,Hossain, Md. Munkir,Umbarkar, Shubhangi,Satyanarayana,Tavale, Sudam S.,Puranik, Vedavati G.
, p. 959 - 963 (2008/10/09)
From the room-temperature reaction of the mixed-chalcogenide compound Fe2(CO)6(μ-SeTe) with phenylacetylene two isomeric products were isolated, Fe2(CO)6{-SeC(H)=C-(Ph)Te} (1) and Fe2(CO)6{μ-SeC(Ph)=C(H)Te} (2). Fe2(CO)6(μ-SSe) reacted with phenylacetylene to form Fe2(CO)6{μ-SC(Ph)=C(H)Se} (3). The room-temperature reaction of Fe2(CO)6(μ-STe) with phenylacetylene also yielded two isomeric products, Fe2(CO)6(μ-SC-(H)=C(Ph)Te) (4) and Fe2(CO)6(μ-SC(Ph)=C(H)Te) (5). In all of these reactions, the homochalcogenide compounds Fe2(CO)6(μ-EC(H)=C(Ph)E) (E = Se, Te, E = S, Se, and E = S, Te, respectively) were also formed in trace amounts. The new compounds 1-5 were characterized by IR and 1H, 13C, 77Se, and 125Te NMR spectroscopy. Compound 1 was structurally characterized by single-crystal X-ray diffraction methods. It crystallized in the triclinic space group P1 with a = 7.773(9) A?, b = 10.635(9) A?, c = 12.010(10) A?, α = 104.99-(10)°, β = 102.86(11)°, γ = 106.38(9)°, V = 872.1(8) A?3, Z = 2, and D(calc) = 2.241 g cm-3. Full-matrix least-squares refinement of 1 converged to R = 0.077 and Rw = 0.086.
Construction of bidentate organosulfur ligands via (μ-RC≡CS)(μ-SLI)Fe2(CO)6 intermediates
Seyferth, Dietmar,Womack, Gary B.
, p. 2360 - 2370 (2008/10/08)
(μ-Dithio)bis(tricarbonyliron) reacts with alkynyllithium reagents in THF at -78°C to give initially (μ-RC≡CS)(μ-LiS)Fe2(CO)6. This species appears to be in equilibrium with either one or, in at least one case (R = Me3Si), both of two possible products of intramolecular thiolate addition to the C≡C bond: (Chemical Equation Presented) The products from such RC≡CLi/(μ-S2)Fe2(CO)6 reactions depend on the electrophilic substrate used. Alkylating and acylating agents yield products derived from the "open" reagent, while protonation and reactions with aldehydes and with group IV (1420) organometallic halides give "closed" 1,2- or 1,1-dithiolene products.
Addition of alkynyllithium reagents to the S-S bond of (μ-dithlo)bis(tricarbonyliron): Equilibria between open S-centered and bridged C-centered anions
Seyferth, Dietmar,Womack, Gary B.,Song, Li-Cheng
, p. 776 - 779 (2008/10/08)
Alkynyllithium reagents cleave the S-S bond of (μ-S2)Fe2(CO)6 to give (μ-RC≡CS)(μ-LiS)Fe2(CO)6 complexes which apparently are in equilibrium with products of intramolecular S- addition to t
