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Conformational Preference of the Torand Ligand in Its Complexes with Potassium and Rubidium Picrate
Author(s) -
Bell Thomas W.,
Cragg Peter J.,
Drew Michael G. B.,
Firestone Albert,
Kwok DawIong A.
Publication year - 1992
Publication title -
angewandte chemie international edition in english
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 0570-0833
DOI - 10.1002/anie.199203451
Subject(s) - picrate , rubidium , chemistry , crystallography , ligand (biochemistry) , ring (chemistry) , metal , metal ions in aqueous solution , ion , potassium , stereochemistry , receptor , organic chemistry , biochemistry
Despite the different sizes of the metal ions , torand 1 retains its staggered conformation in the complexes 1 · K + (picrate − ) and 1 · Rb + (picrate − ), as established by X‐ray structure determinations. In contrast, other macrocyclic ligands usually adjust their conformation according to the bonding demands of the metal ions. The exceptionally rigid cavity of 1 constructed from condensed ring systems is responsible for this behavior.