Numéro
J. Phys. I France
Volume 4, Numéro 3, March 1994
Page(s) 441 - 451
DOI https://doi.org/10.1051/jp1:1994150
DOI: 10.1051/jp1:1994150
J. Phys. I France 4 (1994) 441-451

The first ET salt with a metal complex anion containing a selenocyanate ligand, (ET) 2TIlHg(SeCN) 4 : synthesis, structure and properties

L. I. Buravov1, N. D. Kushch1, V. N. Laukhin1, A. G. Khomenko1, E. B. Yagubskii1, M. V. Kartsovnik2, A. E. Kovalev2, L. P. Rozenberg2, R. P. Shibaeva2, M. A. Tanatar3, V. S. Yefanov3, V. V. Dyakin3 and V. A. Bondarenko4

1  Institute of Chemical Physics in Chernogolovka, Russian Academy of Science, Chernogolovka, 142432, Russia
2  Institute of Solid State Physics, Russian Academy of Science, Chernogolovka, 142432, Russia
3  Institute of Surface Chemistry, Ukrainian Academy of Sciences, Kiev, Ukraine
4  Institute of Semiconductors, Ukrainian Academy of Sciences, Kiev, Ukraine


(Received 8 October 1993, accepted 25 November 1993)

Abstract
Synthesis of the first ET salt with a metal complex anion containing a selenocyanate ligand, $\alpha$-(ET) 2TlHg(SeCN) 4, and its structure are reported. The temperature dependence of conductivity and thermopower in varions crystallographic directions and the Shubnikov-de Haase oscillations have been studied. Distinctions of the bond length distributions in three crystallographically independent ET have been found, which may result in some charge localization in the radical-cation layer. A detailed comparison of the structure and properties of the compound obtained to its thiocyanate analog has been performed. It bas been shown that in the $\alpha$-(ET) 2TIHg(SeCN) 4 salt there is no low-temperature phase transition characteristic of the $\alpha$-(ET) 2MHg(SCN) 4 compounds with M=K, Tl and Rb.



© Les Editions de Physique 1994

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