Study of quadrupole-perturbed quartets in the solid-state magic-angle spinning phosphorus-31 NMR spectra of phosphine-copper(I) complexes. 63Cu electric field gradients and anisotropy in the 31P,63Cu scalar coupling

1992 ◽  
Vol 114 (14) ◽  
pp. 5758-5763 ◽  
Author(s):  
Alejandro Olivieri
Keyword(s):  
Solid State ◽  
Electric Field ◽  
Nmr Spectra ◽  
Magic Angle Spinning ◽  
Scalar Coupling ◽  
Magic Angle ◽  
Electric Field Gradients ◽  
Field Gradients ◽  
Angle Spinning

23Na magic-angle spinning and double-rotation NMR study of solid forms of sodium valproate

2014 ◽  
Vol 92 (1) ◽  
pp. 9-15 ◽  
Author(s):  
Nuiok M. Dicaire ◽  
Frédéric A. Perras ◽  
David L. Bryce
Keyword(s):  
Solid State ◽  
Sodium Valproate ◽  
Nmr Spectra ◽  
Structural Information ◽  
Magic Angle Spinning ◽  
Magic Angle ◽  
Multiple Quantum ◽  
Asymmetric Unit ◽  
Nmr Study ◽  
Angle Spinning

Sodium valproate is a pharmaceutical with applications in the treatment of epilepsy, bipolar disorder, and other ailments. Sodium valproate can exist in many hydrated and acid-stabilized forms in the solid state, and it can be difficult to obtain precise structural information about many of these. Here, we present a 13C and 23Na solid-state NMR study of several forms of sodium valproate, only one of which has been previously structurally characterized by single-crystal X-ray diffraction. 23Na magic-angle spinning (MAS), double-rotation (DOR), and multiple-quantum magic-angle spinning (MQMAS) NMR spectra are shown to provide useful information on the number of molecules in the asymmetric unit, the local coordination geometry of the sodium cations, and the presence of amorphous phases. Two previously identified forms are shown to be highly similar, or identical, according to the 23Na NMR data. The utility of carrying out both DOR and MQMAS NMR experiments to identify all crystallographically unique sites is demonstrated. 13C cross-polarization MAS NMR spectra also provide complementary information on the number of molecules in the asymmetric unit and the crystallinity of the sample.

Magnetic Field Gradients in Solid State Magic Angle Spinning NMR

1999 ◽  
Vol 141 (1) ◽  
pp. 29-33 ◽  
Author(s):  
W.E. Maas ◽  
A. Bielecki ◽  
M. Ziliox ◽  
F.H. Laukien ◽  
D.G. Cory
Keyword(s):  
Magnetic Field ◽  
Solid State ◽  
Magic Angle Spinning ◽  
Magic Angle ◽  
Field Gradients ◽  
Magnetic Field Gradients ◽  
Angle Spinning

scholarly journals Studies of Fluxionality in Pentachlorocyclopentadienylmercurials RHgC5Cl5 by Solution and Solid State 13C NMR and by 35Cl NQR Spectroscopy

1986 ◽  
Vol 41 (1-2) ◽  
pp. 175-178
Author(s):  
Gary Wulfsberg ◽  
A. C. Buchanan ◽  
Ira Rubin ◽  
Alarich Weiss ◽  
Daniel A. Davis ◽  
...  
Keyword(s):  
Solid State ◽  
13C Nmr ◽  
Nmr Spectra ◽  
Magic Angle Spinning ◽  
Magic Angle ◽  
35Cl Nqr ◽  
Angle Spinning ◽  
C Nmr ◽  
Solid State 13C Nmr

Solution and magic-angle-spinning solid-state 13C NMR spectra are reported for η1-(pentachlorocyclopentadienyl)( pentamethylphenyl) mercury, C6Me5HgC5Cl5 (II). The latter suggests that II is fluxional in the solid state. Some expected consequences of fluxional behavior also appear in the 35Cl NQR spectra of II and several related pentachlorocyclopentadienylmercurials.

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