NMR Study of Complexation of Crown Ethers with [60]- and [70]Fullerenes

2003 ◽  
Vol 107 (18) ◽  
pp. 4213-4217 ◽  
Author(s):  
Sumanta Bhattacharya ◽  
Anubha Sharma ◽  
Sandip K. Nayak ◽  
Subrata Chattopadhyay ◽  
Asok K. Mukherjee
Keyword(s):  
Crown Ethers ◽  
Nmr Study

Structural changes in the complexation of benzo-crown ethers—NOESY and variable-temperature13C NMR study

1991 ◽  
Vol 29 (7) ◽  
pp. 656-666 ◽  
Author(s):  
S. V. Santhana Mariappan ◽  
L. Gomathi ◽  
S. Subramanian
Keyword(s):  
Crown Ethers ◽  
Structural Changes ◽  
Nmr Study

Carbon-13 and phosphorus-31 NMR study of some crown ethers containing phosphorus atoms

1993 ◽  
Vol 31 (2) ◽  
pp. 212-213 ◽  
Author(s):  
E. J. Vincent ◽  
M. El Malouli Bibout ◽  
G. Peiffer ◽  
C. Siv ◽  
K. Pannell
Keyword(s):  
Crown Ethers ◽  
Nmr Study

Konkurrierende Koordination von Kronenethern, Perchloratanionen und Lösungsmittelmolekülen am Co(II)-Ion — Eine Leitfähigkeits-und NMR-Studie in Nitromethan / Competitive Coordination of Crown Ethers, Perchlorate Anions and Solvent Molecules at Co(II)-Ions — A Conductivity and NMR Study on Nitromethane

1987 ◽  
Vol 42 (1) ◽  
pp. 42-46 ◽  
Author(s):  
Franz L. Dickert ◽  
Michael W. Vonend
Keyword(s):  
Crown Ether ◽  
Crown Ethers ◽  
Outer Sphere ◽  
Molar Conductivity ◽  
Mixed Complexes ◽  
Nmr Study ◽  
Competitive Coordination ◽  
Solvent Molecules

Abstract The 1:1 complexes between Co(II) and the crown ethers dibenzo[24]crown-8, dibenzo[18]-crown-6 and [18]crown-6 show a molar conductivity in nitromethane which indicates coordination of even perchlorate anions. The substitution of this anion by solvent molecules can be monitored by conductometric titrations. This procedure reveals that dibenzo[24]crown-8 and [18]crown-6 is a potent five dentate ligand whereas dibenzo[18]crown-6 strongly coordinates only via three donor atoms. The mixed complexes with crown ether and methanol show strong outer-sphere associa-tion with the Perchlorate anions, which can be confirmed by investigations with [15]crown-5 complexes.

NMR study of some benzo-crown ethers and their complexing with calcium perchlorate

1988 ◽  
Vol 37 (3) ◽  
pp. 444-447
Author(s):  
V. P. Kazachenko ◽  
V. O. Zavel'skii ◽  
I. I. Bulgak ◽  
O. A. Raevskii
Keyword(s):  
Crown Ethers ◽  
Nmr Study
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