The synthesis, fluxional properties and X-ray crystal structure of [WI(CO)(C4H3N2S)(η2-MeC2Me)2] (where [C4H3N2S]-=pyrimidine-2-thionate)
作者： Paul K. Baker , Paul D. Jackson , Mary E. Harman , Michael B. Hursthouse
DOI: 10.1016/0022-328X(94)80046-4
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摘要: Abstract Reaction Of [WI2(CO)(NCMe)(η2-MeC2Me)2]· 1 2 CH2Cl2 with one equivalent of K[C4H3N2S] (C4H3N2S = pyrimidine-2-thionate) in diethyl ether at room temperature affords the monoiodide product [WI(CO)(C4H3N2S)(η2-MeC2Me)2] (1) high yield. The molecular structure has been crystallographically determined and is best described as a distorted octahedron, but-2-yne ligands lying trans to iodide both them occupying axial positions, remaining alkyne, carbon monoxide sulphur nitrogen atoms pyrimidine-2-thionate ligand equatorial positions. Variable-temperature 1H NMR spectroscopic studies have shown complex be fluxional. 13C spectroscopy indicates that alkyne donate total six electrons tungsten 1.
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