【摘 要】
：
A polynuclear yttrium trifluoroethoxide was synthesized and its activity for the oligomerization of phenyl isocyanate was tested. Reaction of anhydrous YCl3 wit
【机 构】
：
Key Laboratory of Organic Synthesis of Jiangsu Province
论文部分内容阅读
A polynuclear yttrium trifluoroethoxide was synthesized and its activity for the oligomerization of phenyl isocyanate was tested. Reaction of anhydrous YCl3 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) nm3, Z=1, Dc=1.607 mg·m-3, μ=2.591 mm-1 (Mo Kα), 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.
其他文献
运用三维动网格技术．对离心泵非定常流场进行数值模拟。使用Fluent流动软件的Profile文件定义叶轮计算域边界面的转向和转速。将所有计算域设在同一个惯性系中。采用弹簧光滑
基于Hager对圆锥筒及圆柱体量水槽测流原理分析,推求出梯形渠道机翼形量水槽在自由出流时的流量理论计算公式,指出流量校正系数可由相对水头确定.选择6种收缩比进行了一系列
The phases in the compounds (Gd1-xCex)Co2 with x = 0, 0.1, 0.2, 0.3, 0.4, and 0.5 were investigated by X-ray diffraction, and the magneto-caloric effect for x =
A ternary Sm(Ⅲ) complex with salicylate (sal-) and o-phenanthroline (phen) was synthesized and incorporated in silica matrix by sol-gel method. The luminescenc
The surface of as-prepared LiMn2O4 was modified with ZnO, Al2O3, CoO and LiCoO2 using a simple nitrate melting impregnation method. Transmission electron micros
The inhibition effect of hydroxyapatite (HAP) nanoparticles on hepatocarcinoma was investigated in vivo. The human hepatocarcinoma cell line Bel-7402 was transp
The difference of sensitivity to indole- 3-acetic acid ( IAA ) combined with horseradish peroxidase (HRP) in K562 and BXPC- 3 cells was investigated. The cell p