Table of Contents
International Journal of Inorganic Chemistry
Volume 2011, Article ID 696497, 4 pages
http://dx.doi.org/10.1155/2011/696497
Research Article

Deuterium Isotope Effects on Chemical Shifts of Ammonium Ions: A Solid State NMR Study

Department of Science, Systems and Models, Roskilde University, P.O. Box 260, 4000 Roskilde, Denmark

Received 10 August 2011; Revised 10 October 2011; Accepted 14 October 2011

Academic Editor: Rabindranath Mukherjee

Copyright © 2011 Poul Erik Hansen. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Deuterium isotope effects on chemical shifts are measured in ammonium halides in the solid state using both enriched salts and natural abundance materials. The effects are correlated to chemical shifts and to N···X distances. The deuterium isotope effects on chemical shifts in the solid state are discussed in relation to effects observed in solution. No NH couplings are seen due to fast rotation in the solid, which leads to self-decoupling, whereas ND couplings are present.