Interaction Modes of Titanium Tetrachloride with the Carbonyl Functionality
- 1 November 1996
- journal article
- research article
- Published by Wiley in European Journal of Inorganic Chemistry
- Vol. 129 (11) , 1361-1368
- https://doi.org/10.1002/cber.19961291108
Abstract
Mesityl aldehyde binds TiCl4leading to the first structurally characterized TiCl4‐aldehyde adduct,cis‐[(MesCHO)2TiCl4] (Mes = 2,4,6‐Me3C6H2) (1), which contains a pseudooctahedral titanium and two aldehyde carbonyl groups in acisarrangement. However, in the case of 1:1 TiCl4–acetone adduct [(Me2CO)TiCl3)2(μ‐Cl)2] (3) the solid‐state structure of this acid‐base complex is that of a chloro‐bridged dimer. Both kinds of structures were suggested for the products [{(PhCOMe)TiCl3}2(μ‐Cl)2] (4) and [cis‐(PhCOMe)2TiCl4] (5) formed by the reaction of TiCl4with acetophenone in 1:1 and 1:2 molar ratio. Thioesters behave like acetone in that they give adducts8and9with TiCl4, where9, [{(PhSC(Me)O)TiCl3}2(μ‐Cl)2], exhibits a solid‐state dimeric structure like3. The bidentate bonding mode of the chiral propionyloxazolidone12with TiCl4was revealed by an X‐ray analysis of13.Keywords
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