H. Miyoshi et al., CL-35 NQR, H-1-NMR, AND X-RAY-DIFFRACTION STUDIES IN A HYDROGEN-BONDED COMPLEX NA2PTCL6-CENTER-DOT-6H(2)O, Zeitschrift fur Naturforschung. A, A journal of physical sciences, 53(6-7), 1998, pp. 603-607
The Cl-35 NQR frequencies, spin-lattice relaxation time and H-1 NMR re
laxation time were measured on crystalline Na2PtCl6 . H2O at 77-350 K.
The presence of three nonequivalent chlorine sites found by X-ray dif
fraction measurement is in agreement with the observed three NQR lines
, which have different temperature dependences attributable to differe
nces in the direction of H-bonding with water molecules. The three NQR
lines correspond to three kinds of chlorines with different Pt-Cl dis
tances and H-bond directions.