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Structure and Selectivity of a Small Dimeric Encapsulating Assembly
Author(s) -
Valdés Carlos,
Toledo Leticia M.,
Spitz Urs,
Rebek Julius
Publication year - 1996
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.19960020814
Subject(s) - selectivity , intermolecular force , hydrogen bond , molecule , methane , chemistry , proton nmr , crystal structure , crystallography , stereochemistry , organic chemistry , catalysis
The binding selectivity of a dimeric molecular capsule in solution and its X‐ray crystal structure in the solid state are reported. The capsule is a self‐complementary bisglycoluril molecule, formed through a series of intermolecular hydrogen bonds. The dimeric host is capable of discriminating in CDCl 3 solution between methane and ethane as guests, and direct evidence for the selectivity is presented from 1 H NMR studies. The thermodynamic parameters for the encapsulation of methane, obtained from a VT 1 H NMR (500 mHz) study, are presented.