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Dynamics of lysine hydrochloride dihydrate measured by carbon-13 NMR spectroscopy

✍ Scribed by Scott D. Swanson; Robert G. Bryant

Publisher
John Wiley and Sons
Year
1992
Tongue
English
Weight
333 KB
Volume
30
Category
Article
ISSN
0749-1581

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✦ Synopsis

Abstract

The ^13^C NMR spectra for L‐lysine hydrochloride dihydrate are reported for static samples and samples spinning at the magic angle, which provide resolution of each carbon resonance. The spectra and the T~1s~, T~1p~ and T~1~ relaxation times for the carbon atoms demonstrate that there is little motion of the side‐chain in this crystal environment. The carbon spin–lattice relaxation is approximately accounted for by rotational motions of the ammonium ions in the range 50–100 ns and motions of the water molecules in the region of 50 ps or 70 ns. The backbone motions are relatively unimportant for relaxation of the carbon spins.

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