Journal article
Synthesis and Structures of Mono- and Bis(amidinate) Complexes of Aluminum
Organometallics, Vol.16(24), pp.5183-5194
11/25/1997
DOI: 10.1021/om9706323
Abstract
The synthesis and structures of mono- and bis(amidinate) aluminum complexes are described. The reaction of AlMe3 and 1 equiv of carbodiimide, R‘NCNR‘, affords {MeC(NR‘)2}AlMe2 (1a, R‘ = iPr; 1b, R‘ = Cy = cyclohexyl). The reaction of R‘NCNR‘ with MeLi or tBuLi generates Li[RC(NR‘)2] (2a, R = Me, R‘ = iPr; 3a, R = tBu, R‘ = iPr; 3b, R = tBu, R‘ = Cy; 3c, R = tBu, R‘ = SiMe3). 2a, 3a, and 3b may be isolated or reacted in situ, while attempted isolation of 3c gave [Li(tBuCN){μ-N(SiMe3)2}]2 (3d). The reaction of 1 equiv of AlCl3 with 2a or 3a−c affords {RC(NR‘)2}AlCl2 (4a, R = Me; 5a−c, R = tBu), and the reaction of AlMe2Cl with 3a−c affords {tBuC(NR‘)2}AlMe2 (6a−c). Alkylation of 5a,b with 2 equiv of PhCH2MgCl or Me3CCH2Li yields {tBuC(NR‘)2}Al(CH2Ph)2 (7a,b) or {tBuC(NR‘)2}Al(CH2CMe3)2 (8a,b). The reaction of 0.5 equiv of AlCl3 with 2a or 3a,b yields {RC(NR‘)2}2AlCl (9a, R = Me; 10a,b, R = tBu). Complexes 1b, 3d, 4a, 5a,b, 6b, 8b, 9a, and 10a,b have been characterized by X-ray crystallography. The crystallographic results establish that steric interactions between the R and R‘ groups influence the R‘−N−Al angle and, hence, the steric environment at aluminum.
Details
- Title: Subtitle
- Synthesis and Structures of Mono- and Bis(amidinate) Complexes of Aluminum
- Creators
- Martyn P. Coles - University of IowaDale C. Swenson - University of IowaRichard F. Jordan - University of IowaVictor G. Young - University of Minnesota
- Resource Type
- Journal article
- Publication Details
- Organometallics, Vol.16(24), pp.5183-5194
- DOI
- 10.1021/om9706323
- ISSN
- 0276-7333
- eISSN
- 1520-6041
- Language
- English
- Date published
- 11/25/1997
- Academic Unit
- Chemistry
- Record Identifier
- 9984622745702771
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