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Reaction of trimethylaluminum with crown ethers. III. The synthesis and crystal structure of (12-crown-4)bis(trimethylaluminum)

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Abstract

The crown ether 12-crown-4 reacts with trimethylaluminum in toluene to form the complex [AlMe3]2[12-crown-4]. Attempts to utilize the remaining two oxygen atoms for coordination to AlMe3 molecules were unsuccessful. The 2∶1 complex crystallizes in the monoclinic space groupP21/n witha=11.342(7),b=12.941(4),c=6.973(6) Å, and β=95.48(4)°. Refinement led to a finalR value of 0.047 for 925 observed reflections. The molecule resides on a crystallographic center of inversion, and as required by symmetry, the four oxygen atoms are planar. The Al−O bond is strong as revealed by the bond length of 1.977(3) Å.

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Authors and Affiliations

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

    Gregory H. Robinson, Simon G. Bott, Hosny Elgamal, William E. Hunter & Jerry L. Atwood

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  1. Gregory H. Robinson
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  2. Simon G. Bott
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  3. Hosny Elgamal
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  4. William E. Hunter
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  5. Jerry L. Atwood
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Additional information

Supplementary Data relating to this article are deposited with the British Library as Supplementary Publication No. SUP 82013 (9 pages).

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Robinson, G.H., Bott, S.G., Elgamal, H. et al. Reaction of trimethylaluminum with crown ethers. III. The synthesis and crystal structure of (12-crown-4)bis(trimethylaluminum). Journal of Inclusion Phenomena 3, 65–69 (1985). https://doi.org/10.1007/BF00658863

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  • DOI: https://doi.org/10.1007/BF00658863

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