ChemInform Abstract: Supramolecular Assistance to Regioselectivity in the Reactions of Chlorocyclophosphazenes with Sodium Oxyanions: Macrocyclic Effect and Anion Dependence.

ChemInform ◽  
2010 ◽  
Vol 32 (51) ◽  
pp. no-no
Author(s):  
Krystyna Brandt ◽  
Mariola Siwy ◽  
Iwona Porwolik-Czomperlik ◽  
Jerzy Silberring
Keyword(s):  
Macrocyclic Effect

Macrocyclic effect in extraction of metals by crown compounds containing diphenyloxy spacers

2007 ◽  
Vol 416 (2) ◽  
pp. 280-284
Author(s):  
V. V. Yakshin ◽  
O. M. Vilkova ◽  
S. A. Kotlyar ◽  
G. L. Kamalov
Keyword(s):  
Crown Compounds ◽  
Extraction Of Metals ◽  
Macrocyclic Effect

Synthesis, structure, and complexing properties of macrocyclic receptors for anions

2007 ◽  
Vol 79 (6) ◽  
pp. 1087-1096 ◽  
Author(s):  
Michał J. Chmielewski ◽  
Tomasz Zieliński ◽  
Janusz Jurczak
Keyword(s):  
Hydrogen Bonds ◽  
Building Blocks ◽  
Structural Studies ◽  
Anion Receptors ◽  
Model Compounds ◽  
Intramolecular Hydrogen Bonds ◽  
Macrocyclic Receptors ◽  
Complexing Properties ◽  
Intramolecular Hydrogen ◽  
Macrocyclic Effect

Understanding of structure-affinity relationships is crucial for rational receptor design, however, such studies for anion receptors are still limited. Therefore, we investigated this issue in the case of amide-based macrocyclic receptors derived from aromatic diacids (i.e., isophthalic and dipicolinic). Using these model compounds, we examined the macrocyclic effect, the influence of intramolecular hydrogen bonds, and the correlation between the ring size and anion affinity. We found that in contrast to what was known for acyclic diamides, macrocyclic isophthalamide receptors bind anions more weakly than their dipicolinic analogs. Comprehensive structural studies revealed that such behavior is due to intramolecular hydrogen bonds present in isophthalamide receptors. Furthermore, we demonstrated how this obstacle can be overcome by the preparation of a hybrid macrocycle based on both building blocks.

Comparison of the macrocyclic effect for ether hosts in aqueous and organic solvents

1993 ◽  
Vol 97 (40) ◽  
pp. 10509-10512 ◽  
Author(s):  
J. N. Spencer ◽  
J. E. Mihalick ◽  
T. J. Nicholson ◽  
P. A. Cortina ◽  
J. L. Rinehimer ◽  
...  
Keyword(s):  
Organic Solvents ◽  
Macrocyclic Effect

Crown thioethers and the kinetic macrocyclic effect. Solvolysis of molybdenum(0) tricarbonyl complexes of cyclic and acyclic trithioethers

1995 ◽  
Vol 20 (6) ◽  
pp. 583-589 ◽  
Author(s):  
Marcus C. Durrant ◽  
Beatrix Goerdt ◽  
Christina Hauser ◽  
Thorsten Krawinkel ◽  
Raymond L. Richards
Keyword(s):  
Crown Thioethers ◽  
Macrocyclic Effect
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