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TitleN-methyldiethanolamine-modified titanium isopropoxide: X-ray crystal structure of [Ti2(μ2-(OCH2CH2)2NCH 3)(μ2-OPri)(OPRi)5]
Publication TypeJournal Article
Year of Publication2002
AuthorsKemmitt, T., Al-Salim N.I., and Gainsford G.J.
JournalAustralian Journal of Chemistry
Pagination513 - 517
Date Published2002
ISSN00049425 (ISSN)
KeywordsAmines, Chemical bonds, cooling, Intermetallics, Ligand exchange processes, Molecular Structure, nuclear magnetic resonance spectroscopy, Solutions, Synthesis (chemical), Thermal effects, Titanium compounds, X ray crystallography
AbstractA highly fluxional dititanium N-methyldiethoxoamine hexaisopropoxide complex was isolated from reactions of N-methyldiethanolamine with Ti(OPri)4. X-ray crystallography identified the solid state compound as the unsymmetrical complex Ti2(μ2-(OCH2CH2)2NCH 3)(μ2-OPri)(OPri)5. In solution, the time-averaged structure was shown by NMR to be symmetrical. The amine function coordinates to both titanium atoms alternately, while the isopropoxide ligands exchange to maintain equal coordination numbers on both titaniums. Variable temperature NMR demonstrates that the exchange processes slow on cooling, and a spectrum consistent with the solid-state structure is apparent at -50 °C.

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