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The use of crown ethers to access new M[Al2R6X] species. Synthesis and crystal structure of [K · dibenzo-18-crown-6] [Al2Me6Cl] · 2 C6H6

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Abstract

Potassium chloride does not react with trimethylaluminium in benzene in the absence of a crown ether. With the addition of dibenzo-18-crown-6, a normal liquid clathrate ensues. The composition of the parent compound has been established by a single crystal X-ray diffraction study. The space group is monoclinicP21/c with unit cell dimensionsa=21.319(8),b=9.512(4),c=21.081(8) Å, β=93.79(3)°, andρ calc1.15 g cm−3 forZ=4. Refinement led to a final conventionalR value of 0.049 for 2224 observed reflections. The anion has the expected angular geometry (Al−Cl−Al=120.0(1)°). There are two different types of benzene in the crystalline solid. One is associated with the K+ ion, while the other exists in layers normal to thea axis.

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Authors and Affiliations

  1. Department of Chemistry, University of Alabama, 35486, University, AL, USA

    Jerry L. Atwood, Duane C. Hrncir & Robin D. Rogers

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  1. Jerry L. Atwood
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  2. Duane C. Hrncir
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  3. Robin D. Rogers
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Atwood, J.L., Hrncir, D.C. & Rogers, R.D. The use of crown ethers to access new M[Al2R6X] species. Synthesis and crystal structure of [K · dibenzo-18-crown-6] [Al2Me6Cl] · 2 C6H6 . Journal of Inclusion Phenomena 1, 199–207 (1983). https://doi.org/10.1007/BF00656823

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  • DOI: https://doi.org/10.1007/BF00656823

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