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), pp. 180-186. (doi:10.1002/(SICI)1521-3749(200001)626:1<180::AID-ZAAC180>3.0.CO;2-O).


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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
Digital Object Identifier (DOI): doi:10.1002/(SICI)1521-3749(200001)626:1<180::AID-ZAAC180>3.0.CO;2-O
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Keywords: aluminium alkyl aminoalkoxide chlorides, nmr spectroscopy (al-27), crystal structuresdiels-alder reaction, amino alkoxides, lewis-acids, aluminum, dimethylaluminum, complexes, additions
ePrint ID: 18861
Date :
Date Event
1 January 2000Published
Date Deposited: 05 Jan 2006
Last Modified: 16 Apr 2017 23:08
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