Reaction of trimethylaluminum with crown ethers. III. The synthesis and crystal structure of (12-crown-4)bis(trimethylaluminum) |
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Authors: | Gregory H Robinson Simon G Bott Hosny Elgamal William E Hunter Jerry L Atwood |
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Institution: | (1) Department of Chemistry, University of Alabama, 35486 University, AL, USA |
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Abstract: | The crown ether 12-crown-4 reacts with trimethylaluminum in toluene to form the complex AlMe3]212-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 =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.
Supplementary Data relating to this article are deposited with the British Library as Supplementary Publication No. SUP 82013 (9 pages). |
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Keywords: | crown ether trimethylaluminum crystal structure |
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