ChemInform Abstract: Novel Methods of Structure Determination of Prenylated Phenols with 1H and 13C NMR Spectra

ChemInform ◽  
2010 ◽  
Vol 30 (25) ◽  
pp. no-no
Author(s):  
Taro Nomura ◽  
Toshio Fukai
Keyword(s):  
13C Nmr ◽  
Structure Determination ◽  
Nmr Spectra ◽  
13C Nmr Spectra ◽  
1H And 13C Nmr ◽  
Novel Methods

Computer-aided determination of microfragmentary composition of organic molecule by mass-, 1H- and 13C-NMR spectra

1994 ◽  
Vol 18 (1) ◽  
pp. 81-88
Author(s):  
B.G. Derendyaev ◽  
K.S. Lebedev ◽  
S.A. Nekhorshev ◽  
S.P. Kirshansky
Keyword(s):  
13C Nmr ◽  
Nmr Spectra ◽  
Organic Molecule ◽  
13C Nmr Spectra ◽  
1H And 13C Nmr ◽  
Computer Aided

Determination of the Structure of Chlorobutyl and Bromobutyl Rubber by NMR Spectroscopy

1987 ◽  
Vol 60 (4) ◽  
pp. 636-646 ◽  
Author(s):  
Chia Yeh Chu ◽  
Kenneth Norman Watson ◽  
Rastko Vukov
Keyword(s):  
Nmr Spectroscopy ◽  
13C Nmr ◽  
Nmr Spectra ◽  
Broad Band ◽  
Type Structure ◽  
13C Nmr Spectra ◽  
Model Compounds ◽  
1H And 13C Nmr

Abstract An analysis of the 1H and 13C NMR spectra of the chlorobutyl and bromobutyl rubbers was performed. Peaks were assigned based on evidence from broad-band decoupled, off-resonance decoupled, selectively decoupled and J-modulated spectra, the known characterization of butyl rubber and halogenation studies on model compounds. The assignment of the minor peaks indicated that the exomethylene-type structure is predominant in both halogenated rubbers. They also contain some nonhalogenated isoprenyl units. Bromobutyl rubber also contains some α-bromomethyl-type structures resulting from rearrangement of the exomethylene structure. The presence of endo-type structures will require further study for confirmation.

Some Considerations Regarding the 1H and 13C Spectra of 4-(1-azulenyl)-2,6-bis(2-heteroaryl-vinyl)- pyrylium and Pyridinium and their Corresponding Pyridines

2018 ◽  
Vol 69 (1) ◽  
pp. 64-69
Author(s):  
Liviu Birzan ◽  
Mihaela Cristea ◽  
Constantin C. Draghici ◽  
Alexandru C. Razus
Keyword(s):  
Double Bond ◽  
13C Nmr ◽  
Nmr Spectra ◽  
Chemical Shifts ◽  
Pyridinium Salts ◽  
13C Nmr Spectra ◽  
1H And 13C Nmr ◽  
Pyrylium Salts

The 1H and 13C NMR spectra of several 2,6-diheteroarylvinyl heterocycles containing 4-azulenyl moiety were recorded and their proton and carbon chemical shifts were compared with those of the compounds without double bond between the heterocycles. The influence of the nature of central and side heterocycles, molecule polarization and anisotropic effects were revealed. The highest chemical shifts were recorded for the pyrylium salts and the lowest at pyridines, but in the case of the pyridinium salts, the protons chemical shifts at the central heterocycle are more shielded due to a peculiar anisotropy of the attached vinyl groups.

Studies of the neutral trisaccharides of goat (Capra hircus) colostrum and of the one- and two-dimensional 1H and 13C NMR spectra of 6′-N-acetylglucosaminyllactose

1994 ◽  
Vol 262 (2) ◽  
pp. 173-184 ◽  
Author(s):  
Tadasu Urashima ◽  
William A. Bubb ◽  
Michael Messer ◽  
Yuhnagi Tsuji ◽  
Yasuko Taneda
Keyword(s):  
13C Nmr ◽  
Nmr Spectra ◽  
Capra Hircus ◽  
13C Nmr Spectra ◽  
Two Dimensional ◽  
1H And 13C Nmr ◽  
The One

ChemInform Abstract: Diels-Alder Adducts of a Spirocyclopentenotriazoloazodienophile. Assignment of Their 1H and 13C NMR Spectra.

ChemInform ◽  
2010 ◽  
Vol 27 (50) ◽  
pp. no-no
Author(s):  
N. E. ALEXANDROU ◽  
G. E. MERTZANOS ◽  
J. STEPHANIDOU-STEPHANATOU ◽  
C. A. TSOLERIDIS
Keyword(s):  
13C Nmr ◽  
Nmr Spectra ◽  
Diels Alder ◽  
13C Nmr Spectra ◽  
1H And 13C Nmr
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