Chiral Dimethylindium Aminoalkoxides
| Autor: | Joachim Sieler, Thomas Gelbrich, K.‐H. Thiele, Elmar Hecht |
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| Rok vydání: | 2000 |
| Předmět: | |
| Zdroj: | Main Group Chemistry. 3:109-116 |
| ISSN: | 1745-1167 1024-1221 |
| DOI: | 10.1080/13583140012331339079 |
| Popis: | Chiral dimethylindiumaminoalkoxides of general formula Me2InOR+ [OR∗ = (+);(-)-2-piperidyl-methoxy (1), (+);(-)-dimethylamino-2-propoxy (2), (S)-(+)-amino-2-propoxy (3), (S)-α, α-diphenyl-2-pyrrolidinyl-methoxy (4)] have been prepared by reaction of Me3In with the corresponding aminoalcohols HOR∗ and characterized by 1H and 13C nmr spectroscopy and X-ray crystallography. Dimeric molecules of 1–4 are composed of two μ2-O-bridged chelating rings, the latter formed due to N—In donor-acceptor interaction. This geometry is comparable with that of aluminium and gallium analogues previously investigated. In the case of 1 and 4, the formation of the N—In bond proceeds stereospecifically. The absolute structure of 3 and 4 was confirmed by refinement of the Flack parameter. 1: C2/m; a = 15.999(3) A, b = 9.803(2) A, c = 7.410(1) A, β = 111.04(3)°; Z = 2; density (calc.) = 1.586 Mg/m3; R1 = 0.026 for 944 independent reflections with F 2 > 2σ(F 2). 2: C2/c; a = 13.184(3) A, b = 9.987(2) A, c = 15.851(3) A, β = 90.66(3... |
| Databáze: | OpenAIRE |
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