Synthesis and structures of titanosiloxane cage compounds

Jeong Hyun Kim, Seung Hyun Kang, Il Nam Jung, Kwan Mook Kim, Bok Ryul Yoo, Myong Euy Lee

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


Reaction of (triphenylmethyl)silanetriol (1) with cyclopentadienyltitanium trichloride (CpTiCl3) in the presence of triethylamine as a HCl scavenger gave both compounds of a partial open-cage type {[Ph 3CSiO(OH)]3(Ph3CSiO3/2)(CpTiO 3/2)4} (2) and cube type (Ph3CSiO 3/2CpTiO3/2)4 (3). The 1:1 reaction of 1 and CpTiCl3 in toluene solvent at reflux temperature for 3 d afforded compounds 2 (22%) and 3 (36%). When 1 is reacted with a 1.5 fold excess of CpTiCl3 under the same conditions, compound 3 was obtained in high yield (81%) along with 2 in trace quantities. Compounds 2 and 3 were fully characterized by the analyses of 1H, 13C, 29Si NMR, IR, and FAB MS data. The solid-state structure of 3 was determined by a single crystal X-ray diffraction study. Compound 3 had shown to have catalytic activity for the oxidation of alkenes such as 1-octene, cyclooctene, and norbornene with t-butyl hydrogen peroxide. The effect of solvent was observed in this epoxidation reaction. The order of reactivity were decreased as follows: CHCl3 > hexane ≫ THF.

Original languageEnglish
Pages (from-to)31-35
Number of pages5
JournalJournal of Sol-Gel Science and Technology
Issue number1-3
StatePublished - Dec 2004

Bibliographical note

Funding Information:
This research was supported financially by the Ministry of Science and Technology.


  • Alkene
  • Cage compounds
  • Cyclopentadienyltitanium trichloride
  • Polytitanosiloxane
  • Polytitanosilsesquioxane
  • Slanetriol


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