J. Phys. IV France
Volume 114, April 2004
Page(s) 595 - 597

J. Phys. IV France
114 (2004) 595
DOI: 10.1051/jp4:2004114142

Structures and physical properties of cation radical salts based on low-symmetrical ethylenedioxy-ethylenedithio-TTF

Y. Yoshida, M. Maesato, H. Yamochi and G. Saito

Division of Chemistry, Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan

Crystal structures and physical properties have been investigated for two cation radical salts formed with EOET, which is a hybrid molecule between ET and BO. The Mott-insulating $\kappa '$-(EOET) 2Cu[ N(CN) 2] Br salt has a spin-singlet ground state, while the $\kappa $-(EOET) 2GaCl 4 salt with a triangular lattice composed of EOET dimers shows a metal-insulator transition at around 40 K. Key words. EOET - , crystal - structure, electron paramagnetic resonance, - metal-insulator transition.

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