15N-NMR study of activated enamines. Structural dependence of ? (15N) andnJ(N,H) in primary, secondary and tertiary enamino-ketones, esters and amides

1983 ◽  
Vol 66 (7) ◽  
pp. 2113-2128 ◽  
Author(s):  
Lech Kozerski ◽  
Krystyna Kamienska-Trela ◽  
Lidia Kania ◽  
Wolfgang Von Philipsborn
Keyword(s):  
15N Nmr ◽  
Structural Dependence ◽  
Enamino Ketones ◽  
Nmr Study ◽  
Activated Enamines

15N NMR study of the mechanism of the reaction of amidoximes with nitrites in the presence of ZnCl2 and HCl

1994 ◽  
Vol 43 (4) ◽  
pp. 627-629 ◽  
Author(s):  
V. N. Yarovenko ◽  
B. I. Ugrak ◽  
M. M. Krayushkin ◽  
V. Z. Shirinyan ◽  
I. V. Zavarzin
Keyword(s):  
15N Nmr ◽  
Nmr Study ◽  
Mechanism Of The Reaction

15N NMR Study of the P-N Bonding in Phosphoric Amides

1999 ◽  
Vol 147 (1) ◽  
pp. 271-271
Author(s):  
Agnes M Modro ◽  
Tom A Modro ◽  
P. Bernatowicz ◽  
Wojciech Schilf ◽  
Lech Stefaniak
Keyword(s):  
15N Nmr ◽  
Nmr Study

15N Nmr Study of Toxoflavin and Fervenulin

Heterocycles ◽  
2000 ◽  
Vol 52 (2) ◽  
pp. 811 ◽  
Author(s):  
Hiroyuki Koshino ◽  
Yoshiki Kono ◽  
Katsuyoshi Yoneyama ◽  
Jun Uzawa
Keyword(s):  
15N Nmr ◽  
Nmr Study

Eine 15N-NMR-untersuchung einiger trimethylstannylhydrazine / A15N-NMR study of some trimethylstannylhydrazines

1989 ◽  
Vol 44 (6) ◽  
pp. 653-658 ◽  
Author(s):  
Bernd Wrackmeyer ◽  
Theo Gasparis-Ebeling ◽  
Heinrich Nöth
Keyword(s):  
Nmr Spectroscopy ◽  
Lone Electron Pair ◽  
Electron Pair ◽  
Relative Magnitude ◽  
Coupling Constants ◽  
15N Nmr ◽  
Nmr Study ◽  
Geminal Coupling ◽  
In Cis ◽  
First Time

The trimethylstannylhydrazines (Me3Sn)2N-NMe2 (1), Me3Sn(Me)N-N(Me)SnMe3 (2), (Me3Sn)2N-N(Me)SnMe3 (3), and (M e3Sn)2N-N(Ph)SnMe3 (4) have been studied by δ15N NMR at natural abundance. A correlation between δ15N of hydrazines and δI5N of corresponding am ines (replacement of one N-atom by the CH-unit) is proposed in order to estimate δI5N values and to support the non-trivial assignment of 15N resonances of hydrazines. Geminal coupling constants 2J(119SnN 15N) have been observed for the first time. Their relative magnitude is related to the probability of the N-Sn bond being in cis-position with respect to the orientation of the lone electron pair at the 15N nucleus in the 119Sn-N-15N fragment. Treatment of 4 with phenylacetylene causes non-selective cleavage of the Sn-N bonds, leading to the trim ethylstannylhydrazines 5 and 6 which have been characterized by 119Sn and 15N NMR spectroscopy in solution

Multinuclear 1H, 13C and 15N NMR study of some substituted 2-amino-4-nitropyridines and their N-oxides

2002 ◽  
Vol 58 (7) ◽  
pp. 1425-1435 ◽  
Author(s):  
K. Laihia ◽  
E. Kolehmainen ◽  
R. Kauppinen ◽  
J. Lorenc ◽  
A. Puszko
Keyword(s):  
15N Nmr ◽  
Nmr Study

A 15N-NMR study of isolated brain in portacaval-shunted rats after acute hyperammonemia

1991 ◽  
Vol 1096 (4) ◽  
pp. 270-276 ◽  
Author(s):  
Keiko Kanamori ◽  
Brian D. Ross ◽  
Neil A. Farrow ◽  
Farhad Parivar
Keyword(s):  
15N Nmr ◽  
Nmr Study
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