Optical and electrical conductivity measurements have been made on [Pd
(H(2)EDAG)(HEDAG)]TCNQ (H(2)EDAG = ethylenediaminoglyoxime). The metal
-insulator transition was observed. Around the metal-insulator transit
ion temperature, new vibration bands appeared at 3250cm(-1), indicatin
g that this salt is a strongly electron-proton coupled system.