1H- and 13C-NMR-Spectroscopic Study of Chemical Equilibria in Solutions of Formaldehyde in Water, Deuterium Oxide, and Methanol

1994 ◽  
Vol 33 (4) ◽  
pp. 1022-1029 ◽  
Author(s):  
Immanuel Hahnenstein ◽  
Hans Hasse ◽  
Cornelius G. Kreiter ◽  
Gerd Maurer
Keyword(s):  
Spectroscopic Study ◽  
13C Nmr ◽  
Deuterium Oxide ◽  
1H And 13C Nmr ◽  
Chemical Equilibria

Chemistry of chromotropic acid. 1H and 13C NMR spectroscopy of chromotropic acid and its derivatives

1991 ◽  
Vol 69 (8) ◽  
pp. 1207-1211 ◽  
Author(s):  
Paris E. Georghiou ◽  
Chi Keung (Jimmy) Ho ◽  
Chester R. Jablonski
Keyword(s):  
Nmr Spectroscopy ◽  
13C Nmr ◽  
Nmr Spectra ◽  
Deuterium Oxide ◽  
13C Nmr Spectroscopy ◽  
Chromotropic Acid ◽  
Hydroxyl Groups ◽  
Two Dimensional ◽  
1H And 13C Nmr ◽  
C Nmr

The 1H and 13C NMR spectra of chromotropic acid (CTA) (4,5-dihydroxy-2,7-naphthalenedisulphonic acid) have been unambiguously assigned. Proton NOED spectra were used to show the proximity of both H-3 and H-6 and the hydroxyl groups. Two-dimensional 1H–13C NMR correlation spectra of CTA, of its corresponding diacetoxy derivative, and of 3-bromo- and 3,6-dibromo-CTA support the assignments. A regioselective deuterium exchange reaction of the C-3 and C-6 protons of CTA with deuterium oxide was observed during the NMR experiments. This latter finding is strongly indicative of the mode of formation, and of the nature of the chromogen formed in the reaction of CTA with formaldehyde in the well-known CTA-formaldehyde analytical reaction. Key words: chromotropic acid, 3-bromochromotropic acid, 3,6-dibromochromotropic acid.

1H and 13C NMR Spectra of Technically Important Sodium 1- and 2-Aminonaphthalenesulfonates

1993 ◽  
Vol 58 (6) ◽  
pp. 1378-1387 ◽  
Author(s):  
Josef Jirman
Keyword(s):  
13C Nmr ◽  
Sulfonic Acid ◽  
Nmr Spectra ◽  
Chemical Shifts ◽  
Deuterium Oxide ◽  
Acid Group ◽  
Sulfonic Acid Group ◽  
13C Nmr Spectra ◽  
1H And 13C Nmr ◽  
C Nmr

The 1H and 13C NMR spectra of twenty-one technically important sulfonated 1- and 2-naphthylamines have been measured in deuterium oxide. The substituent chemical shifts (SCS) of a sulfonic acid group on naphthylamine skeleton have been calculated from the chemical shifts assigned.

scholarly journals 1H and 13C-NMR Spectroscopic Study of Some 1H-4,5-Dihydroimidazolium Salts

Molecules ◽  
2000 ◽  
Vol 5 (12) ◽  
pp. 479-480
Author(s):  
Alejandra Salerno ◽  
Isabel Perillo
Keyword(s):  
Spectroscopic Study ◽  
13C Nmr ◽  
1H And 13C Nmr

scholarly journals 1H-AND 13C-NMR SPECTROSCOPIC STUDY OF GLUCOSE METABOLISM IN EGGS OF ANGIOSTRONGYLUS CANTONENSIS DURING THEIR DEVELOPMENT

1987 ◽  
Vol 40 (1) ◽  
pp. 27-33 ◽  
Author(s):  
Masakazu TAKAHASHI ◽  
Masami NISHINA ◽  
Eitaro HORI ◽  
Kazuhiro MATSUSHITA ◽  
Kenzo KATO ◽  
...  
Keyword(s):  
Glucose Metabolism ◽  
Spectroscopic Study ◽  
13C Nmr ◽  
Angiostrongylus Cantonensis ◽  
1H And 13C Nmr

High-Field 1H and 13C NMR Spectroscopic Study of the 2-Norbornyl Cation

2003 ◽  
pp. 510-513
Author(s):  
George A. Olah ◽  
G. K. Surya Prakash ◽  
Massoud Arvanaghi ◽  
Frank A. L. Anet
Keyword(s):  
Spectroscopic Study ◽  
13C Nmr ◽  
High Field ◽  
1H And 13C Nmr
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