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Zeitschrift für Naturforschung A

A Journal of Physical Sciences

Editor-in-Chief: Holthaus, Martin

Editorial Board: Fetecau, Corina / Kiefer, Claus

12 Issues per year

IMPACT FACTOR 2016: 1.432

CiteScore 2017: 1.30

SCImago Journal Rank (SJR) 2017: 0.403
Source Normalized Impact per Paper (SNIP) 2017: 0.632

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Volume 50, Issue 6


Molecular Motion in Solid Tetraethyl -and Tetrapropylammonium Tetrafluoroborates

Barbara Szafrańska / Zdzisław Pająk
Published Online: 2014-06-02 | DOI: https://doi.org/10.1515/zna-1995-0610


Proton and fluorine NMR second moments and spin-lattice relaxation times for polycrystalline tetraethyl-and tetrapropylammonium tetrafluoroborates have been measured over a wide range of temperatures. Solid-solid phase transitions were found for both compounds and confirmed by DSC. Methyl group C3 reorientation followed by more complex cation motions was evidenced in the low temperature phases. Overall cation reorientation characterises the high temperature phases of both compounds. Isotropic anion reorientation was found in both salts in both phases.

Keywords : NMR; Molecular motions; Phase transitions

About the article

Received: 1994-08-15

Published Online: 2014-06-02

Published in Print: 1995-06-01

Citation Information: Zeitschrift für Naturforschung A, Volume 50, Issue 6, Pages 584–588, ISSN (Online) 1865-7109, ISSN (Print) 0932-0784, DOI: https://doi.org/10.1515/zna-1995-0610.

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© 1946 – 2014: Verlag der Zeitschrift für Naturforschung. This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License. BY-NC-ND 3.0

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