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Volumn 121, Issue 31, 1999, Pages 7201-7210

Mono- and dinuclear silica-supported titanium(IV) complexes and the effect of TiOTi connectivity on reactivity

Author keywords

[No Author keywords available]

Indexed keywords

2 PROPANOL; ALCOHOL; AMIDE; CYCLOHEXANE OXIDE; LIGAND; PROPYLENE; SILICON DIOXIDE; TERT BUTYL HYDROPEROXIDE; TITANIUM DERIVATIVE;

EID: 0033546742     PISSN: 00027863     EISSN: None     Source Type: Journal    
DOI: 10.1021/ja9829160     Document Type: Article
Times cited : (118)

References (86)
  • 17
    • 0344467496 scopus 로고    scopus 로고
    • GB Patent 1,249,79, 1971
    • Wulff, H. GB Patent 1,249,79, 1971.
    • Wulff, H.1
  • 18
    • 0344036369 scopus 로고    scopus 로고
    • Notari, B. U.S. Patent 4,410,501, 1983
    • Taramasso, M.; Perego, G.; Notari, B. U.S. Patent 4,410,501, 1983.
    • Taramasso, M.1    Perego, G.2
  • 38
    • 0344899261 scopus 로고    scopus 로고
    • note
    • 3: 26.0, 75.6 ppm.
  • 41
    • 0344467494 scopus 로고    scopus 로고
    • note
    • -1. The spectra of the supported Ti complexes on silica-200 and silica-500 are qualitatively very similar, although the ligand vibrations on silica-500 are slightly more intense.
  • 44
    • 0344036368 scopus 로고    scopus 로고
    • note
    • A blank experiment showed that 2-propanol is not chemisorbed on the surface hydroxyl groups of silica at room temperature, nor is it dehydrated to propene in the presence of silica under these conditions.
  • 45
    • 0344467493 scopus 로고    scopus 로고
    • note
    • 3: 13.3 and 45.0 ppm.
  • 47
    • 0345330300 scopus 로고    scopus 로고
    • note
    • -1. The spectra of the supported Ti complexes on silica-200 and silica-500 are qualitatively very similar, although the ligand vibrations on silica-500 are slightly more intense.
  • 50
    • 0344036366 scopus 로고    scopus 로고
    • note
    • In free 2-propanol, this signal appears at 64.7 ppm. The methyl carbon signal of coordinated 2-propanol is presumed to be superimposed on the methyl signal of the 2-propoxide ligands at 23.8 ppm.
  • 51
    • 0345330299 scopus 로고    scopus 로고
    • note
    • 2 on the surface in reactions 7-10.
  • 53
    • 0344899259 scopus 로고    scopus 로고
    • note
    • Both mono- and dinuclear supported Ti complexes catalyze the conversion of cyclohexene to the epoxide when both tert-butylhydroperoxide and cyclohexene are present in excess. The possibility of Ti mobility and oligomerization of the mononuclear complexes under catalytic conditions is under investigation.
  • 55
    • 0344467492 scopus 로고    scopus 로고
    • note
    • Hydrolysis-condensation reactions in aqueous sol-gel processes are, however, notorious for giving polynuclear TiOTi species.
  • 56
    • 0344467491 scopus 로고    scopus 로고
    • note
    • iPr.
  • 59
    • 0344899258 scopus 로고
    • Trotman-Dickson, A. F., Ed.; Compendium: Elmsford, NY
    • Clark, R. J. In Comprehensive Inorganic Chemistry; Trotman-Dickson, A. F., Ed.; Compendium: Elmsford, NY, 1973; Vol. 3, p 386.
    • (1973) Comprehensive Inorganic Chemistry , vol.3 , pp. 386
    • Clark, R.J.1


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.