| | 1 | Author
| Barbara Szafrańska, Zdzisław Pająk | Requires cookie* | | | Title
| Molecular Motion in Solid Tetraethyl-and Tetrabutylammonium Perchlorates  | | | | Abstract
| The proton N M R second moment and spin-lattice relaxation time for polycrystalline tetraethyl-and tetrabutylammonium perchlorates have been measured over a wide range of temperatures. Solid-solid phase transitions related to the onset of cation tumbling were found for both compounds and confirmed by DSC. In the low temperature phases methyl-group reorientation was evidenced. For tetrabutylammonium cation a dynamic nonequivalence of one methyl group is found. The geared motion of the alkyl chains related with the onset of successive C H 2-group reorientations is suggested. | | | |
Reference
| Z. Naturforsch. 49a, 465—468 (1994); received December 7 1993 | | | |
Published
| 1994 | | | |
Keywords
| N M R, Molecular motions, Phase transitions | | | |
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| default:Reihe_A/49/ZNA-1994-49a-0465.pdf | | | | Identifier
| ZNA-1994-49a-0465 | | | | Volume
| 49 | |
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