- Title
- Metallocene and organo-main group trifluoromethanesulfonates
- Creator
- Angus-Dunne, Sarah J.; Lee Chin, Lisa E. P.; Burns, Robert C.; Lawrance, Geoffrey A.
- Relation
- Transition Metal Chemistry Vol. 31, Issue 2, p. 268-275
- Publisher Link
- http://dx.doi.org/10.1007/s11243-005-6410-3
- Publisher
- Springer Netherlands
- Resource Type
- journal article
- Date
- 2006
- Description
- The substituted metallocene compounds Cp₂M(OSO₂CF₃)₂ (Cp=η⁵-C₅H₅; M = Ti, Zr, Hf, Nb, Mo), CpTi(OSO₂CF₃)₃ · 0.75(1,2-dimethoxyethane), and the organo-main group compounds (C₆H₅)₃M'(OSO₂CF₃) (M′=Si, Ge), (C₆H₅)₂Sn(OSO₂CF₃)₂ and (C₆H₅)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(OSO₂CF₃)₃ · 0.75(1,2-dimethoxyethane) and the organo-germanium triflate show evidence of bidentate CF₃SO₃− 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, Cp₂HfCl₂/Ag(OSO₂CF₃), CpTiCl₃/Ag(OSO₂CF₃) and (C₆H₅)₂SiCl₂/Ag(OSO₂CF₃), are also reported.
- Subject
- metallocene; organo-main group compounds; trifluoromethanesulfonate; triflate; tetrahydrofuran; polymerization
- Identifier
- http://hdl.handle.net/1959.13/33727
- Identifier
- uon:3279
- Identifier
- ISSN:0340-4285
- Language
- eng
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