Synthesis and Characterization of A Polynuclear Yttrium Trifluoroethoxide and Its Activity for Oligomerization of Phenyl Isocyanate

• Published in: Journal of rare earths Vol. 24; no. 4; pp. 509 - 512
• Main Author: 彭红梅 姚英明 邓明宇 张勇 沈琪
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.08.2006; Key Laboratory of Organic Synthesis of Jiangsu Province, Department of Chemistry and Chemical Engineering, Suzhou University, Suzhou 215123, China
• Subjects: crystal structure; inorganic chemistry; lanthanide alkoxo complex; O614.33; O631.5; rare earths; trifluoroethoxide; 多环化合物; 异氰酸苯酯; 无机化学; 晶体结构; lanthanide alkoxo complex; inorganic chemistry; trifluoroethoxide; O631.5; crystal structure; O614.33; rare earths
• ISSN: 1002-0721; 2509-4963
• DOI: 10.1016/S1002-0721(06)60153-1

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.