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Metallocene and org...
Metallocene and organo-main group trifluoromethanesulfonates
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- Angus-Dunne, Sarah J. (author)
- Mälardalens högskola
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- Lee Chin, L. E. P. (author)
- University of Newcastle, Australia
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- Burns, R. C. (author)
- University of Newcastle, Australia
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- Lawrance, G. A. (author)
- University of Newcastle, Australia
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(creator_code:org_t)
- Springer Science and Business Media LLC, 2006
- 2006
- English.
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In: Transition metal chemistry (Weinheim). - : Springer Science and Business Media LLC. - 0340-4285 .- 1572-901X. ; 31:2, s. 268-275
- Related links:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Subject headings
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- The substituted metallocene compounds Cp2M(OSO 2CF3)2 (Cp=η5-C 5H5; M = Ti, Zr, Hf, Nb, Mo), CpTi(OSO2CF 3)3 • 0.75(1,2-dimethoxyethane), and the organo-main group compounds (C6H5)3M′(OSO 2CF3) (M′=Si, Ge), (C6H5) 2Sn(OSO2CF3)2 and (C 6H5)3Sb(OSO2CF3) 2, were synthesized from the corresponding chloride or bromide compounds and silver trifluoromethanesulfonate (triflate) and characterized spectroscopically, including a detailed analysis of their IR spectra. Triflate coordination is typically monodentate, but CpTi(OSO2CF 3)3 • 0.75(1,2-dimethoxyethane) and the organo-germanium triflate show evidence of bidentate CF3SO 3 - ligands and are likely to have polymeric structures. Conductance measurements in nitromethane, acetone and acetonitrile have demonstrated the ease of triflate substitution, with a limited kinetic study of acetone solvation of the Ti and Hf compounds supporting an associative pathway. Three new catalysts for the polymerization of tetrahydrofuran, Cp 2HfCl2/Ag(OSO2CF3), CpTiCl 3/Ag(OSO2CF3) and (C6H 5)2SiCl2/Ag(OSO2CF3), are also reported.
Keyword
- Acetone
- Catalysts
- Esters
- Polymerization
- Reaction kinetics
- Synthesis (chemical)
- Metallocene compounds
- Solvation
- Tetrahydrofuran
- Olefins
Publication and Content Type
- ref (subject category)
- art (subject category)
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