The interaction of alkali metal cations with aromatic molecules in complexes of the type M[AlMe3X]·aromatic,M[Al2Me6X]·aromatic,and related |
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| Authors: | 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 crystal structures of 13 compounds of the form MAl2Me6X]·aromatic and related have been examined in order to learn about the M+...aromatic approach. Four types of interactions have been discerned: (1) metal...aromatic, (2) metal...aromatic...metal, (3) aromatic...metal...aromatic, and (4) no metal...aromatic contact. It was found that the closest K+...C(aromatic) and Cs+...C(aromatic) separations are essentially equal after a correction for the difference in metal radii. The strength of the K+...aromatic attraction was found to be sufficient to move the K+ ion 0.3 Å out of the plane of the crown ether in two complexes of dibenzo-18-crown-6. |
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| Keywords: | alkali metal ions metal-aromatic interactions crystal structure aluminum alkyls |
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