[(c-C5H9)7Si8O13Ti(O(i)Pr)3] | 856255-55-5

• 分子结构分类: 有机化合物 - 有机盐 - 有机金属盐
• 英文名称: [(c-C5H9)7Si8O13Ti(O(i)Pr)3]
• CAS: 856255-55-5
• 化学式: C₄₄H₈₄O₁₆Si₈Ti
• 分子量: 1141.71
• InChiKey: JTCBFABDLCDCIM-KPWBKDBTSA-N

反应信息

• 作为产物：
  描述：

  titanium(IV) isopropylate 、 3,5,7,9,11,13,15-heptacyclopentylpentacyclooctasiloxan-1-ol 以 乙醚 为溶剂， 以80%的产率得到[(c-C5H9)7Si8O13Ti(O(i)Pr)3]
  参考文献：
  名称：

  Catalytic sites in silica-supported titanium catalysts: silsesquioxane complexes as models

  摘要：

  The number of Si-O-Ti bonds in silica-supported titanium catalysts is an important parameter that affects activity and selectivity. Although comparisons between different catalysts can be made by infrared spectroscopy. estimation of the Contribution of the different species is a difficult task. UV spectroscopy has been used to characterize three different titanium-silsesquioxane complexes. The wavelength in solution is highly dependent on the concentration, and broad bands are obtained by DRUV at wavelengths that correlate with the number of Si-O-Ti bonds. The deconvolution of the DRUV spectra of silica-supported titanium catalysts allows identification of the three types of tetrahedral (pentacoordinated) species, together with octahedral species. These results correlate well with the known silanol densities of the different silica supports. and the catalytic activity and selectivity for epoxidation are clearly favored by the reduction in octahedral titanium and the increase in the number of tripodal species. (c) 2005 Elsevier Inc. All rights reserved.

  DOI：

  10.1016/j.jcat.2005.04.018