¹¹³Cd NMR studies of Hofmann-type clathrates and related compounds: Evidence for two room temperature orientational glasses

Abstract

113 Cd magic angle spinning NMR, with and without 1 H cross-polarisation and decoupling, has been used to study a number of Hofmann-type clathrates and related compounds. The 113 Cd chemical shift shows a great sensitivity to the environment of Cd, even for complexes with closely related structures. The presence of five resonances due to Cd surrounded by C x N (4–x) (where x = 0 to 4) in Cd(CN) 2 and Cd(CN) 2 •C 6 H 12 indicates a static disorder of the CN groups, which makes these materials orientational glasses. Keywords: 113 Cd NMR, Hofmann-type clathrates, Cd(CN) 2 , disorder, orientational glass.