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Synthesis and X-ray structures of tetralithium derivatives of tert-butylcalix[4]arene containing unique Li–O cores basedon a square-pyramidal geometry

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Davidson, M. G., Howard, J. A. K., Lamb, S., & Lehmann, C. W. (1997). Synthesis and X-ray structures of tetralithium derivatives of tert-butylcalix[4]arene containing unique Li–O cores basedon a square-pyramidal geometry. Chemical Communications, (17), 1607-1608. doi:10.1039/A702280H.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0024-76AA-7
Abstract
Tetralithiation of tert-butylcalix[4]arene in the presence of hmpa (hexamethylphosphoramide) results in the isolation of either a monomeric complex in which LiOH is incorporated into an Li5O5 core based on an isolated square pyramid of Li atoms, or a dimeric LiOH-free species containing an Li8O8 core in which the same structural motif is maintained by edge-sharing of two square pyramids of Li atoms.