The synthesis and novel conformational properties of doubly and triply intrabridged calixarenes 1 and 2 are presented. Compound 1 is shown by VT-NMR and 2D EXSY NMR to exist in CDCl3 solution as a mixture of 1,2-alternate and cone conformers, while 2 adopts predominantly an asymmetrical conformation at temperatures below 235 K. Compound 1 in the solid state, determined by X-ray crystallography, exists in a very distorted cone-shaped conformation.

Synthesis and Conformational Properties of Proximally Dioxymethylene-intrabridged Calixarenes

NERI, Placido;
1992

Abstract

The synthesis and novel conformational properties of doubly and triply intrabridged calixarenes 1 and 2 are presented. Compound 1 is shown by VT-NMR and 2D EXSY NMR to exist in CDCl3 solution as a mixture of 1,2-alternate and cone conformers, while 2 adopts predominantly an asymmetrical conformation at temperatures below 235 K. Compound 1 in the solid state, determined by X-ray crystallography, exists in a very distorted cone-shaped conformation.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11386/3136538
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