
TY  - JOUR
A1  - Fergusson, JE 
A1  - Scaife, DE 
T1  - Chlorine nuclear quadrupole resonance studies of K<sub>2</sub>IrCl<sub>6</sub>-K<sub>2</sub>PtCl<sub>6</sub> solid solutions
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 1971
VL  - 24
IS  - 7
SP  - 1325
EP  - 1329
KW  - 
UR  - https://doi.org/10.1071/CH9711325 
N2  - The cubic lattice parameters for the solid solution system K2IrCl6- K2PtCl6 vary approximately linearly with composition from a0 = 9.765±0.001 &#506; for K2,IrCl6, to a0 = 9.748±0.001 &#506; for K2PtCl6. The 35Cl n.q.r, frequencies show shifts from the frequencies observed in the pure compounds, these shifts being approximately linear with composition at each of the temperatures 77°K, 201°K, and 298°K. The shifts in frequency on going from 0-100% Pt are, for the chlorine atoms bonded to the iridium, +93 kHz, and for the chlorine atoms bonded to the platinum, +84 kHz.     The infrared stretching frequencies of the MCl62- groups also show shifts which are approximately linear with composition. The extrapolated shifts in going from 0-100% Pt are +11 cm-1 and +4.5 cm-1 for the Pt-Cl and Ir-Cl stretching frequencies, respectively. The n.q.r. and infrared results are best accounted for by small changes in the M-Cl bond lengths within the MCl62- group, with concurrent changes in a0, and possibly also in the positional parameter u. Re-examination of the variation of magnetic susceptibility with composition in the K2IrCl6-K2PtCl6 system is also reported, and reasons proposed for the form of this variation.     35Cl n.q.r. frequencies are reported for Cs2IrCl6. 
ER  -

