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Triple Inclusion by a Calixarene: the CrystaL Structure of the Europium( III ) Complex of Bis(homooxa)‐ p‐tert ‐butylcalix[4]arene
Author(s) -
Asfari Zouhair,
Harrowfield Jack M.,
Ogden Mark I.,
Vicens Jacques,
White Allan H.
Publication year - 1991
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.199108541
Subject(s) - calixarene , europium , dimer , molecule , chemistry , substrate (aquarium) , stereochemistry , crystallography , crystal structure , active center , enzyme , ion , organic chemistry , oceanography , geology
A minimal model system for enzymes is embodied in the dimeric title complex; the structure of one half of the dimer is illustrated on the right. A Eu III (hatched) center is coordinated to five O atoms (dotted) at the base of the calixarene. In addition, a dimethylsulfoxide molecule is bonded to the metal ion, and an acetone molecule is also enclosed. The structure is reminiscent of the active site of an enzyme bonded to substrate and coenzyme.