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  • 1
    Electronic Resource
    Electronic Resource
    Tetramethylpiperidine-Alane Adducts tmpH · AlX3 (X = Cl, Br, I) and tmpH · AlH2Cl: Synthesis, Solution Behavior, and X-ray Crystal Structures⋆ (1998)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 1998 (1998), S. 1925-1930 
    Details
    ISSN: 1434-1948
    Keywords: Tetramethylpiperidine-aluminum trihalide adducts ; Tetramethylpiperidine-monochloroalane ; Conductivity measurements ; 27Al-NMR spectroscopy ; Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: 2,2,6,6-Tetramethylpiperidine (tmpH) reacts smoothly with aluminum trihalides AlX3 (X = Cl, Br, I) and monochloroalane AlH2Cl · 2 thf to give the addition compounds tmpH · AlX3 (X = Cl, Br, I) and tmpH · AlH2Cl, respectively. These adducts of the secondary amine tmpH are stable and do not undergo intramolecular elimination of HX or H2 with formation of the aminoalanes tmpAlX2 or tmpAl(H)Cl. In the solid state, tmpH · AlX3 (X = Cl, Br, I) and tmpH · AlH2Cl are tetracoordinated molecular adducts. While this is also true for solutions of tmpH · AlX3 (X = Br, I) and tmpH · AlH2Cl, the compound tmpH · AlCl3 dissolves in CH2Cl2 as the salt [tmpAlCl3]tmpH2 and the adduct tmpH · Al2Cl6, as is evident from its NMR spectra and from conductivity measurements. This behavior is supported by a semiempirical AM1 calculation.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Synthesis and Structures of Bis(tetramethylipiperidino)aluminum Halides-X-ray Crystal Structures of tmp2AlX (X = Cl, Br, I) and [tmp2A1(μ-F)l2 (1997)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 130 (1997), S. 1047-1052 
    Details
    ISSN: 0009-2940
    Keywords: Bis(tetramethylipiperidino)aluminum halides ; Alkoxy((tetramethylpiperidino)aluminum halides ; 27Al-NMR spectra ; Aluminum ; Amides ; Synthetic methods ; Bridging ligands ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: N-Lithio-2,2,6,6-tetramethylpiperidine [Li(tmp)] reacts with AlX3 (X = Cl, Br) in diethyl ether/ n-hexane solution to generate the products of substitution and ether cleavage, [tmpAl(X)(μ-OEt)], (la, X = Cl; 1b, X = Br). However, when the reaction is allowed to proceed in n-hexane alone, an almost quantitative yield of compounds tmp2AlX (2a, X = Cl; 2b, X = Br; 2c, X = I) is obtained. According to 27AI-NMR spectroscopy, mass spectroscopy, cryoscopy, and X-ray crystal structure determinations, these compounds are monomeric in the solid state, in solution, and in the gas phase. 2b reacts with AgBF4 yielding the fluoride-bridged dimer (tmp2AlF), 2d, as shown by X-ray crystal structure determination.
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19971300805
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