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NMR relaxation study of rotational motion in low-barrier ammonium salts

✍ Scribed by M. Bonori; M. Terenzi

Publisher
Elsevier Science
Year
1974
Tongue
English
Weight
321 KB
Volume
27
Category
Article
ISSN
0009-2614

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✦ Synopsis

The temperature dependence of the proton spin-lattice relaxation times T1 and Tip for polycrystalline (NH~)~RuCI~, (NHa)zPdCle and (NHd)zPtClb, shows that the ammonium reorientation is the dominant relaxation mechanism.

In these salts, as for other low-barrier ammonium salts, the activation energies are small, as suggested by considerations concerning the lattice structure and symmetry.

πŸ“œ SIMILAR VOLUMES

Torsional Motion in (tert-Butyl)ammonium
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✍ Emilyβ€…F. Maverick; Carolynβ€…B. Knobler; Saeed Khan; Jamesβ€…W. Canary; Iraβ€…B. Dicke πŸ“‚ Article πŸ“… 2003 πŸ› John Wiley and Sons 🌐 German βš– 162 KB

## Abstract The ADPs (ADPs=atomic anisotropic displacement parameters) from the single‐crystal X‐ray studies of nine related TBA^+^ (TBA^+^=(__tert__‐butyl)ammonium) hemispheraplexes are analyzed, and the results compared to the free energy of binding of this guest by the nine hosts. The lipophilic