Monomeric organoaluminium complexes RAl(OR*)2 and R2AlOR* with an optically active amino alkoxide ligand
| Autor: | Elmar Hecht, Thomas Gelbrich, K.‐H. Thiele, Joachim Sieler |
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| Rok vydání: | 2000 |
| Předmět: |
Ligand
Organic Chemistry Nuclear magnetic resonance spectroscopy Biochemistry Inorganic Chemistry Metal chemistry.chemical_compound Crystallography Monomer Stereospecificity chemistry visual_art Alkoxide X-ray crystallography Materials Chemistry visual_art.visual_art_medium Physical and Theoretical Chemistry Chirality (chemistry) |
| Zdroj: | Journal of Organometallic Chemistry. 595:21-30 |
| ISSN: | 0022-328X |
| DOI: | 10.1016/s0022-328x(99)00516-1 |
| Popis: | The reactions of trialkylaluminium, R 3 Al, with ( S )-(−)α,α-diphenyl-2-pyrrolidinyl-methanol have been investigated, in which unusual bis-complexes RAl(OR*) 2 were obtained [OR*=( S )-α,α-diphenyl-2-pyrrolidinyl-methoxide (Dpm), R=Me ( 1 ), Et ( 2 ), 1-Nor ( 3 )]. A similar reaction carried out with R= t -Bu yields, by contrast, the expected mono-alkoxide R 2 AlOR* ( 4 ). All compounds were characterised by X-ray crystallography and NMR spectroscopy. The molecular structures are monomeric. In 1 – 3 , the aluminium centres bonded to the nitrogen atoms of two chelating ligands are five-coordinate, while the metal atom contained in 4 is tetrahedrally surrounded. The absolute structures of all complexes were determined from X-ray diffraction data. The formation of the dative AlN bonds is stereospecific in all cases. |
| Databáze: | OpenAIRE |
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