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Updated: Jul 10, 2026

Construction and Systematical Symmetric Studies of a Series of Supramolecular Clusters with Binary or Ternary Ammonium Triphenylacetates
Published on: February 15, 2016
Understanding the correlation of structure and selectivity in the chiral-phosphoramide-catalyzed enantioselective
1Roger Adams Laboratory, Department of Chemistry, University of Illinois, Urbana, Illinois 61801, USA.
Abstract:
Complexation of bisphosphoramides, linked by various length methylene tethers, with tin tetrachloride was studied by both solution NMR spectroscopy and single-crystal X-ray crystallography. The formation of cis-configured, octahedral 1/1 bisphosphoramide.SnCl(4) complexes was supported by both crystallographic and solution NMR studies. In addition, the formation of such complexes was shown to be highly dependent on the tether length and solution concentration. Single-crystal X-ray analysis of bisphosphoramide.SnCl(4) complexes also provided detailed information on the stereochemical environment relevant to the enantioselectivity of asymmetric allylation reactions.
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