A polynuclear yttrium trifluoroethoxide was synthesized and its activity for the oligomerization of phenyl isocyanate was tested. Reaction of anhydrous YC13 with CF3CH2ONa in a 1 ： 3 molar ratio in THF at room temper...A polynuclear yttrium trifluoroethoxide was synthesized and its activity for the oligomerization of phenyl isocyanate was tested. Reaction of anhydrous YC13 with CF3CH2ONa in a 1 ： 3 molar ratio in THF at room temperature, after workup, gave complex 1 as colorless crystals. The composition of complex 1 is [Y（OCH2CF3）3]6ONa2（THF）12, which was identified by elemental analysis and ^1H NMR. Further X-ray structure determination reveals that complex 1 is a polynuclear ion pair compound, [Y6（μ6-O）（OCH2CF3）18]^2- [Na（THF）6]2＋ （1）. The crystal data of complex 1 are trigonal, P-3 space group, a = 1.78440（14） nm, b = 1.78440（14） nm, c = 1.27395（12） nm, γ= 120°, V=3.5129（5） nm^3, Z = 1, Dc = 1.607 mg·m^-3, μ = 2.591 mm^- 1（Mo Ka）, F（000） = 1710, R = 0.067, wR = 0. 182. Preliminary results demonstrated that complex 1 is a highly effective catalyst for the oligomerization of phenyl isocyanate.展开更多
基金Project supported bythe National Natural Science Foundation of China (20472063)
文摘A polynuclear yttrium trifluoroethoxide was synthesized and its activity for the oligomerization of phenyl isocyanate was tested. Reaction of anhydrous YC13 with CF3CH2ONa in a 1 ： 3 molar ratio in THF at room temperature, after workup, gave complex 1 as colorless crystals. The composition of complex 1 is [Y（OCH2CF3）3]6ONa2（THF）12, which was identified by elemental analysis and ^1H NMR. Further X-ray structure determination reveals that complex 1 is a polynuclear ion pair compound, [Y6（μ6-O）（OCH2CF3）18]^2- [Na（THF）6]2＋ （1）. The crystal data of complex 1 are trigonal, P-3 space group, a = 1.78440（14） nm, b = 1.78440（14） nm, c = 1.27395（12） nm, γ= 120°, V=3.5129（5） nm^3, Z = 1, Dc = 1.607 mg·m^-3, μ = 2.591 mm^- 1（Mo Ka）, F（000） = 1710, R = 0.067, wR = 0. 182. Preliminary results demonstrated that complex 1 is a highly effective catalyst for the oligomerization of phenyl isocyanate.
