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BY-NC-ND 3.0 license Open Access Published by De Gruyter June 2, 2014

Preparation, Structure and Physical Properties of BEDT-TTF* Nitrates

A. Weber , H. Endres , H. J. Keller , E. Gogu , I. Heinen and D. Schweitzer

Electrocrystallization of BEDT -TTF in THF with tetrabutylammonium nitrate as supporting electrolyte leads to the deposition of at least three different phases. The a-phase (C10H8S8)3(NO3)2, Mt = 1277.98, crystallizes in the monoclinic space group P21/n. The structure of this solid was solved: a = 5.890(2), b = 31.125(10), c = 12.915(6) Ä , β = 103.73(3)°, V = 2300 Å 3, Z - 2, Dx = 1.84 gem-3, MoKfα λ = 0.7107 Å , μ = 11.2 cm-1, F(000) = 1300, room temperature, R = 0.057 for 1888 observed independent reflections. Sheets of BEDT-TTF radical cations with short intermolecular S···S contacts (>3.315(4) Å ) are separated by anion layers. Two more BEDT-TTF nitrates have been characterized by their unit cell data. Results of temperature dependent electrical conductivity and thermopower measurements on crystals of the a-phase are presented. They are metallic down to about 30 K

Received: 1985-7-30
Published Online: 2014-6-2
Published in Print: 1985-12-1

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