Defect structure and molecular motion in the four modifications of n ‐tritriacontane. II. Study of molecular motion using infrared spectroscopy and wide‐line nuclear magnetic resonance measurements

1974 ◽  
Vol 61 (12) ◽  
pp. 5265-5272 ◽  
Author(s):  
B. Ewen ◽  
E. W. Fischer ◽  
W. Piesczek ◽  
G. Strobl
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Infrared Spectroscopy ◽  
Magnetic Resonance ◽  
Defect Structure ◽  
Molecular Motion ◽  
Line Nuclear Magnetic Resonance ◽  
Wide Line ◽  
Nuclear Magnetic

A wide line nuclear magnetic resonance study of molecular motion in pyridinium salts

1970 ◽  
Vol 48 (16) ◽  
pp. 2625-2627 ◽  
Author(s):  
C. H. Matthews ◽  
D. F. R. Gilson
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Molecular Motion ◽  
Nuclear Magnetic Resonance Study ◽  
Pyridinium Salts ◽  
Magnetic Resonance Study ◽  
Line Nuclear Magnetic Resonance ◽  
Pyridinium Ring ◽  
Wide Line ◽  
Nuclear Magnetic

Wide line nuclear magnetic resonance studies of pyridinium hexafluorophosphate, chloride, and nitrate show line width and second moment transitions which are attributed to reorientational motions of the pyridinium ring. The differences in transition temperatures are due to the different hydrogen bonded structures in the three salts.

Nuclear magnetic resonance studies of solid methylammonium halides

1970 ◽  
Vol 48 (5) ◽  
pp. 717-722 ◽  
Author(s):  
J. Tsau ◽  
D. F. R. Gilson
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Line Width ◽  
Molecular Reorientation ◽  
Magnetic Resonance Studies ◽  
Second Moment ◽  
Line Nuclear Magnetic Resonance ◽  
Methylammonium Chloride ◽  
Wide Line ◽  
Nuclear Magnetic

Wide-line nuclear magnetic resonance studies of methylammonium chloride, bromide, and iodide and their partially deuterated analogues show that second-moment and line-width transitions occur which can be interpreted as due to molecular reorientation about the C—N axes. In the bromide and iodide salts this motion persists below 77 °K.

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