Organoaluminium complexes with sterically demanding oximato ligands: does a bulky and rigid ligand backbone change the aggregation motif?

Ullrich M, Mitzel NW, Bergander K, Fröhlich R (2006)
DALTON TRANSACTIONS (5): 714-721.

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Abstract
The four organoaluminium ketoximates [(2,4-dimethylpentane-3-one oximato)AlMe2](2) (1), (meso)-[(norcamphor oximato)AlMe2](2) (2), {[(R,R)-camphor oximato]AlMe2}(3) (3) and {[(R,S)-fenchone oximato]AlMe2}(2) (4) have been prepared by the reactions of the corresponding oximes with trimethylaluminium. All compounds have been fully characterized by means of IR, mass and multi-nuclear NMR spectroscopy (H-1, C-13, Al-27) and by elemental analyses. The crystal structures of three of these compounds (2, 3 and 4) were determined, revealing the aggregation motif of organometallic group 13 oximates to vary from the hitherto predominant six-membered dimeric M2N2O2 array to others (six-membered M3O3 core ring in the case of the camphor derivative; five-membered M2NO2 core ring in the case of the fenchone derivative) so far only found e.g. in hydroxylamino complexes of group 13 metals. Furthermore, complexes 3 and 4 exhibit an unusual behaviour in solution, as indicated by upfield-shifted additional signals in their Al-27 NMR spectra, pointing at aluminium atoms in penta- or hexacoordination, respectively.
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Ullrich M, Mitzel NW, Bergander K, Fröhlich R. Organoaluminium complexes with sterically demanding oximato ligands: does a bulky and rigid ligand backbone change the aggregation motif? DALTON TRANSACTIONS. 2006;(5):714-721.
Ullrich, M., Mitzel, N. W., Bergander, K., & Fröhlich, R. (2006). Organoaluminium complexes with sterically demanding oximato ligands: does a bulky and rigid ligand backbone change the aggregation motif? DALTON TRANSACTIONS(5), 714-721.
Ullrich, M., Mitzel, N. W., Bergander, K., and Fröhlich, R. (2006). Organoaluminium complexes with sterically demanding oximato ligands: does a bulky and rigid ligand backbone change the aggregation motif? DALTON TRANSACTIONS, 714-721.
Ullrich, M., et al., 2006. Organoaluminium complexes with sterically demanding oximato ligands: does a bulky and rigid ligand backbone change the aggregation motif? DALTON TRANSACTIONS, (5), p 714-721.
M. Ullrich, et al., “Organoaluminium complexes with sterically demanding oximato ligands: does a bulky and rigid ligand backbone change the aggregation motif?”, DALTON TRANSACTIONS, 2006, pp. 714-721.
Ullrich, M., Mitzel, N.W., Bergander, K., Fröhlich, R.: Organoaluminium complexes with sterically demanding oximato ligands: does a bulky and rigid ligand backbone change the aggregation motif? DALTON TRANSACTIONS. 714-721 (2006).
Ullrich, M, Mitzel, Norbert W., Bergander, K, and Fröhlich, R. “Organoaluminium complexes with sterically demanding oximato ligands: does a bulky and rigid ligand backbone change the aggregation motif?”. DALTON TRANSACTIONS 5 (2006): 714-721.
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PMID: 20976347

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