Abstract
Both title compounds were prepared by adding AlMe3 to a suspension of the appropriate crown ether in toluene, followed by reaction in a sealed tube. Both products were obtained in the form of extremely air-sensitive, colorless crystals. [AlMe3]3[dibenzo-18-crown-6] crystallizes in space group PĪ, witha=8.898(4),b=11.848(5),c=19.060(6) Å, α=74.86(3), β=80.73(4), and γ=67.02(4)°. Refinement led to a final conventional weightedR value of 0.052 for 1800 reflections. [AlMe3]4[18-crown-6] belongs to space group Pbcn, witha=18.753(3),b=12.570(6), andc=15.095(6) Å. Refinement was taken toR w =0.064 for 1320 reflections.
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Atwood, J.L., Priester, R.D., Rogers, R.D. et al. Reaction of trimethylaluminum with crown ethers. II. The synthesis and crystal structure of (Dibenzo-18-crown-6)tris(trimethylaluminum) and of (18-crown-6)tetrakis(trimethylaluminum). Journal of Inclusion Phenomena 1, 61–69 (1983). https://doi.org/10.1007/BF00658016
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DOI: https://doi.org/10.1007/BF00658016