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Metallocene and organo-main group trifluoromethanesulfonates
Mälardalen University.
University of Newcastle, Australia.
University of Newcastle, Australia.
University of Newcastle, Australia.
2006 (English)In: Transition metal chemistry (Weinheim), ISSN 0340-4285, E-ISSN 1572-901X, Vol. 31, no 2, 268-275 p.Article in journal (Refereed) Published
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Abstract [en]

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.

Place, publisher, year, edition, pages
2006. Vol. 31, no 2, 268-275 p.
Keyword [en]
Acetone, Catalysts, Esters, Polymerization, Reaction kinetics, Synthesis (chemical), Metallocene compounds, Solvation, Tetrahydrofuran, Olefins
Identifiers
URN: urn:nbn:se:mdh:diva-31905DOI: 10.1007/s11243-005-6410-3ISI: 000235447200021Scopus ID: 2-s2.0-32944482039OAI: oai:DiVA.org:mdh-31905DiVA: diva2:937827
Available from: 2016-06-16 Created: 2016-06-14 Last updated: 2016-11-01Bibliographically approved

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