Abstract
The synthesis, crystal structure, and conductivity of a solvent-included ternary charge-transfer salt (BEDT-TTF)2GaCl4(C6H5Cl)0.5 (1) is described and interpreted. Electrochemical oxidation of neutral bis(ethyelenedithio)-tetrathiafulvalene (BEDT-TTF) in the presence of (Me4N)Ga(C2O4)Cl2 in a mixture of C6H5Cl and C2H5OH yields crystals of 1. Compound 1 crystallized as a monoclinic C 2/c space group with cell parameters: a = 47.0615(4) Å, b = 6.7895(1) Å, c = 31.6297(4) Å, β = 132.064(1)°, V = 7503.0(2) Å3, Z = 8 at 293 K and a = 46.4767(5) Å, b = 6.7398(1) Å, c = 31.0778(4) Å, β = 131.630(1)°, V = 7267.4(2) Å3, Z = 8 at 120 K. The formal charge of the donor molecule was assigned as +0.5 from bond lengths in the TTF core. The donor molecules stack with C―···S contacts along the c direction and side-to-side S…S contacts along the b direction to form a two-dimensional donor layer on the bc plane. In the anion sheet, C6H5Cl chain is sandwiched by two GaCl4− chains with Cl…Cl contacts. Compound 1 shows semiconductive behavior with Ea = 124 meV between room-temperature and 150 K and σ300K = 1 S·cm−1.
Highlights
IntroductionIt has been found that the conductivity can be influenced by the solvent molecules which exist in the counterion layer [2]
In a charge-transfer salt, the conductivity is usually controlled by the arrangement of the conducting -unit, such as TTF (TTF = tetrathiafulvalene), BEDT-TTF, M(dmit)2n−, and their derivatives [1]
A ternary charge-transfer salt of BEDT-TTF, GaCl4− and solvent molecule C6H5Cl was obtained when looking for the charge-transfer salt of [BEDT-TTF] and [Ga(C2O4)Cl2−]
Summary
It has been found that the conductivity can be influenced by the solvent molecules which exist in the counterion layer [2]. Depending on the crystal structure of the reported binary charge-transfer salts, interesting physical properties of the ternary charge-transfer salts are expected. The synthesis and characterization of the binary and ternary compounds is necessary in order to achieve a deep understanding of the molecular conductor. Because FeCl4− and GaCl4− could be replaced arbitrarily, the charge-transfer salt of GaCl4− is an important reference for a molecule-based magnetic conductor [3,4]. A ternary charge-transfer salt of BEDT-TTF, GaCl4− and solvent molecule C6H5Cl was obtained when looking for the charge-transfer salt of [BEDT-TTF] and [Ga(C2O4)Cl2−]. Its crystal structure and conductivity are reported here
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
