Crystal structures and solution dynamics of monocyclopentadienyl titanium (IV) complexes bearing pendant ether and phosphanyl type functionalitiesстатьяИсследовательская статья
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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация:Two novel half-sandwich Ti(IV) complexes, [h5:h1-O-C5(CH3)4CH2CH2OCH3]TiCl3 (3) and (h5:h1-P-C5H4CH2CH2PPh2)TiCl3 (6), were prepared and structurally characterised. At elevated temperatures, complex 3 undergoes a conversion into [h5:s-C5(CH3)4CH2CH2O-]TiCl2 (4). The dynamic behaviour of complexes 3 and 6 in solutions has been studied by variable-temperature 1H, 13C and 31P NMR spectroscopy. Thermodynamic parameters of the intramolecular dissociation-coordination processes for 3 and 6 were elucidated by the numerical analysis of the d(T) dependencies. The intramolecular M(IV)<--E (M = Ti, Zr; E = O, P) coordination in half-sandwich cyclopentadienyl complexes is discussed.