Neutron diffraction characterization of C–H···Li interactions in a lithium aluminate polymer
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Date
2014-05-01
Journal Title
Journal ISSN
Volume Title
Publisher
ACS Publications
Abstract
The reaction of AlMe3 with tBuLi in the presence of trimethylacetonitrile affords the bimetallic complex [tBu(Me)Al(μ-Me)2Li·NC(tBu)]∞ (1). Pseudotetrahedral Al centers form by the nucelophilic addition of tBuLi to AlMe3.The alkali-metal center is stabilized through coordination of the unreacted nitrile and polymer formation via the construction of Al(μ-Me)nLi (n = 1, 2) motifs. Neutron diffraction evidences agostic interactions in the bridging methyl group to give further stabilization. There is only one previous report of a neutron structure of a lithium aluminate compound. This work therefore offers an important structural example of agostic interactions and the precise nature of Al(μ-Me)2Li bridging.© 2014, American Chemical Society.
Description
Keywords
Alkali metals, Nitriles, Neutron diffraction, Lithium, Polymers, Hydrogen
Citation
Cole, J. M., Waddell, P. G., Wheatley, A. E. H., McIntyre, G. J., Peel, A. J., Tate, C. W., & Linton, D. J. (2014). Neutron Diffraction Characterization of C–H···Li interactions in a lithium aluminate polymer. Organometallics, 33(15), 3919-3923. doi:10.1021/om500271p