Infrared studies of new onehyphen;dimensional tetracyanoplatinates containing the bifluoride ion

摘要

New onehyphen;dimensional tetracyanoplatinate (TCP) conductors of the type M2lsqb;Pt(CN)4rsqb;(FHF)0.39ndash;0.40where M=Rb+, Cs+, and K2lsqb;Pt(CN)4rsqb;(FHF)0.30sdot;xH2O, were studied by infrared techniques and the fluorine in these compounds was shown to be present as the bifluoride ion (FHF)minus;. The asymmetric hydrogenndash;fluorine stretching vibration was found to be cation dependent, and occurs at higher frequency for the K+salts, as compared to the Rb+and Cs+salts. In contrast to the anion and cationhyphen;deficient onehyphen;dimensional TCP conductors, only one intense CN stretching mode at sim;2150 cmminus;1was observed. The rubidium and cesium salts are lustrous, metallichyphen;gold in color, and appear to be optically different from the reddishhyphen;bronze prototype materials, K2lsqb;Pt(CN)4rsqb;X0.3sdot;3H2O where X=Br or Cl.