Solid-state NMR study of Schiff base derivatives of 2-hydroxynaphthaldehyde. Deuterium isotope effects on15N chemical shifts in the solid state

2005 ◽  
Vol 43 (7) ◽  
pp. 573-577 ◽  
Author(s):  
Z. Rozwadowski ◽  
W. Schilf ◽  
B. Kamieński
Keyword(s):  
Schiff Base ◽  
Solid State ◽  
Solid State Nmr ◽  
Chemical Shifts ◽  
Isotope Effects ◽  
Schiff Base Derivatives ◽  
Nmr Study ◽  
Deuterium Isotope Effects ◽  
Derivatives Of

scholarly journals Deuterium Isotope Effects on 14,15N Chemical Shifts of Ammonium Ions: A Solid State NMR Study

2011 ◽  
Vol 2011 ◽  
pp. 1-4
Author(s):  
Poul Erik Hansen
Keyword(s):  
Solid State ◽  
Solid State Nmr ◽  
Chemical Shifts ◽  
Isotope Effects ◽  
Natural Abundance ◽  
Ammonium Ions ◽  
Fast Rotation ◽  
Nmr Study ◽  
Ammonium Halides ◽  
Deuterium Isotope Effects

Deuterium isotope effects on N14,15 chemical shifts are measured in ammonium halides in the solid state using both enriched N15 salts and N14 natural abundance materials. The effects are correlated to N15 chemical shifts and to N···X distances. The deuterium isotope effects on N14,15 chemical shifts in the solid state are discussed in relation to effects observed in solution. No NH couplings are seen due to fast rotation in the solid, which leads to self-decoupling, whereas ND couplings are present.

scholarly journals 14N, 13C, and 119Sn solid-state NMR characterization of tin(II) carbodiimide Sn(NCN)

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Aleksander Jaworski ◽  
Jędrzej Piątek ◽  
Liuda Mereacre ◽  
Cordula Braun ◽  
Adam Slabon
Keyword(s):  
Solid State ◽  
Solid State Nmr ◽  
Chemical Shifts ◽  
Magic Angle Spinning ◽  
Magic Angle ◽  
Quadrupolar Coupling ◽  
Nmr Study ◽  
Nmr Characterization ◽  
Angle Spinning ◽  
High Level

Abstract We report the first magic-angle spinning (MAS) nuclear magnetic resonance (NMR) study on Sn(NCN). In this compound the spatially elongated (NCN)2− ion is assumed to develop two distinct forms: either cyanamide (N≡C–N2−) or carbodiimide (−N=C=N−). Our 14N MAS NMR results reveal that in Sn(NCN) the (NCN)2− groups exist exclusively in the form of symmetric carbodiimide ions with two equivalent nitrogen sites, which is in agreement with the X-ray diffraction data. The 14N quadrupolar coupling constant | C Q | $\vert {C}_{\text{Q}}\vert $  ≈ 1.1 MHz for the −N=C=N− ion in Sn(NCN) is low when compared to those observed in molecular compounds that comprise cyano-type N≡C– moieties ( | C Q | $\vert {C}_{\text{Q}}\vert $  > 3.5 MHz). This together with the information from 14N and 13C chemical shifts indicates that solid-state NMR is a powerful tool for providing atomic-level insights into anion species present in these compounds. The experimental NMR results are corroborated by high-level calculations with quantum chemistry methods.

Hydrogen/deuterium isotope effects on the 15N NMR chemical shifts and geometries of low-barrier hydrogen bonds in the solid state

1996 ◽  
Vol 378 (1) ◽  
pp. 11-16 ◽  
Author(s):  
Hans Benedict ◽  
Christoph Hoelger ◽  
Francisco Aguilar-Parrilla ◽  
Wolf-Peter Fehlhammer ◽  
Martin Wehlan ◽  
...  
Keyword(s):  
Solid State ◽  
Hydrogen Bonds ◽  
Chemical Shifts ◽  
Isotope Effects ◽  
15N Nmr ◽  
Nmr Chemical Shifts ◽  
Hydrogen Deuterium ◽  
Deuterium Isotope Effects ◽  
Low Barrier Hydrogen Bonds

Deuterium isotope effects on15N chemical shifts of double Schiff bases in the solid state and solution

2003 ◽  
Vol 41 (2) ◽  
pp. 135-138 ◽  
Author(s):  
T. Dziembowska ◽  
K. Ambroziak ◽  
Z. Rozwadowski ◽  
W. Schilf ◽  
B. Kamie?ski
Keyword(s):  
Solid State ◽  
Schiff Bases ◽  
Chemical Shifts ◽  
Isotope Effects ◽  
Deuterium Isotope Effects

Tricyclohexylphosphine Derivatives of Bis(2,6-difluorophenoxide)cadmium:  A Solution and Solid-State NMR Study

2001 ◽  
Vol 40 (14) ◽  
pp. 3639-3642 ◽  
Author(s):  
Donald J. Darensbourg ◽  
Jacob R. Wildeson ◽  
Jason C. Yarbrough ◽  
Robert E. Taylor
Keyword(s):  
Solid State ◽  
Solid State Nmr ◽  
Nmr Study ◽  
Derivatives Of

scholarly journals Solid state NMR study of [epsilon-13C]Lys-bacteriorhodopsin: Schiff base photoisomerization

1993 ◽  
Vol 65 (1) ◽  
pp. 310-315 ◽  
Author(s):  
M.R. Farrar ◽  
K.V. Lakshmi ◽  
S.O. Smith ◽  
R.S. Brown ◽  
J. Raap ◽  
...  
Keyword(s):  
Schiff Base ◽  
Solid State ◽  
Solid State Nmr ◽  
Nmr Study
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