Synthesis and Characterisation of an [18]Crown-5-Ligand and its NaNCS Complex
Open Access
- 1 February 1983
- journal article
- Published by Walter de Gruyter GmbH in Zeitschrift für Naturforschung B
- Vol. 38 (2) , 262-264
- https://doi.org/10.1515/znb-1983-0228
Abstract
The new [18]crown-5 ligand -[18] ⟨O5-(2,2′)-diphenylmethano·24 -coronand-5⟩ [1] -, containing a benzylic CH2 group, was prepared by condensation of 2,2'-dihydroxydiphenylmethane with tetraethylene glycol dichloride. The ligand exhibits an endo-conformation and short O···H2C contacts. The macrocycle ligates Na+ by contracting its cavity so that its five O atoms form an approximately regular pentagon.Keywords
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