Synthesis, properties, and molecular structures of alkylaluminium aminoalkoxide chlorides
Hecht, E., Gelbrich, T., Thiele, K. H. and Sieler, J. (2000) Synthesis, properties, and molecular structures of alkylaluminium aminoalkoxide chlorides. Zeitschrift Fur Anorganische Und Allgemeine Chemie, 626, (1), 180-186. (doi: 10.1002/(SICI)1521-3749(200001)626:1<180::AID-ZAAC180>3.0.CO;2-O).
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Description/Abstract
Alkylaluminium aminoalkoxide chlorides [R(Cl)AlOR*] 1-3 have been obtained from the reaction of dialkyl aluminium chlorides R2AlCl with the respective aminoalkohol HOR* (1: R = Et, OR* = dimethylamino-1-propanol; 2: R = Me, OR* = (+);(-)-dimethylamino-2-propanol; 3: R = Me, OR* = (S)-N-methyl-2-pyrrolidinyl-methanol). The reaction between dimethylaluminium chloride and (S)-alpha,alpha-diphenyl-2-pyrrolidinyl-methanol (OR* = Dpm) yielded, by contrast, the ionic {[MeAl(OR*)(2)AlMe2](+) [MeAlCl3](-)} complex (4). 1-4 have been characterised by H-1,C-13 and Al-27-NMR spectroscopy. Crystal structures of 1 and of the 1:1 solvate of 4 with Et2O have been determined by X-ray methods and the absolute structure of 4 was confirmed by refinement of the Flack-parameter. The dimeric molecules of 1 are composed of two chelating rings linked via an almost planar Al2O2 unit and pentacoordination is observed about aluminium. In contrast, each of the two crystallographically independent cation molecules of 4 contains one four- and and one five-coordinate metal centre.
| Item Type: | Article |
|---|---|
| Related URLs: | |
| Keywords: | aluminium alkyl aminoalkoxide chlorides, nmr spectroscopy (al-27), crystal structuresdiels-alder reaction, amino alkoxides, lewis-acids, aluminum, dimethylaluminum, complexes, additions |
| Subjects: | Q Science Q Science > QD Chemistry |
| Divisions: | University Structure - Pre August 2011 > School of Chemistry |
| Item ID: | 18861 |
| Date Deposited: | 05 Jan 2006 |
| Last Modified: | 01 Jun 2011 03:54 |
| Contributors: | Hecht, E. (Author) Gelbrich, T. (Author) Thiele, K. H. (Author) Sieler, J. (Author) |
| Date: | 1 January 2000 |
| Status: | Published |
| URI: | http://eprints.soton.ac.uk/id/eprint/18861 |
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