The Use of Complexation Induced Proton NMR Chemical Shifts for Structural Analysis of Host-Guest Complexes in Solution

2000 ◽  
Vol 6 (20) ◽  
pp. 3771-3776 ◽  
Author(s):  
Volker Rüdiger ◽  
Hans-Jörg Schneider
Keyword(s):  
Structural Analysis ◽  
Chemical Shifts ◽  
Proton Nmr ◽  
Nmr Chemical Shifts

Parameters for the Calculation of Proton NMR Chemical Shifts of Oligoribonucleotides

1985 ◽  
Vol 2 (4) ◽  
pp. 693-707 ◽  
Author(s):  
Russell A. Bell ◽  
Jeremy R. Everett ◽  
Donald W. Hughes ◽  
Jan M. Coddington ◽  
Dirk Alkema ◽  
...  
Keyword(s):  
Chemical Shifts ◽  
Proton Nmr ◽  
Nmr Chemical Shifts

scholarly journals Carbon-13 NMR Chemical Shift of Methyl Group: A Useful Parameter for Structural Analysis of C-Methylated Flavonoids

2006 ◽  
Vol 1 (11) ◽  
pp. 1934578X0600101
Author(s):  
Pawan K. Agrawal ◽  
Chandan Agrawal ◽  
Shravan Agrawal
Keyword(s):  
Structural Analysis ◽  
Chemical Shift ◽  
Chemical Shifts ◽  
Nmr Chemical Shift ◽  
Methyl Group ◽  
Nmr Chemical Shifts ◽  
Nmr Study ◽  
Pterocarpus Santalinus ◽  
Group A ◽  
C Nmr

The 13C NMR resonances corresponding to the C-Me group of C-6 and/or C-8 C-methylated-flavonoids absorb between 6.7–10.0 ppm and typically between 6.7–8.7 ppm. A comparative 13C NMR study reflects that the 13C NMR chemical shifts reported for 6-hydroxy-5-methyl-3′,4′,5′-trimethoxyaurone-4-O-α-L-rhamnoside from Pterocarpus santalinus and 8-C-methyl-5,7,2′,4′- tetramethoxyflavanone from Terminalia alata are inconsistent with the assigned structures, and therefore need reconsideration.

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