The synthesis, crystal structure, and conductivity of a solvent-included ternary charge-transfer salt (BEDT-TTF)
2GaCl
4(C
6H
5Cl)
0.5 (
1) is described and interpreted. Electrochemical oxidation of neutral bis(ethyelenedithio)-tetrathiafulvalene (BEDT-TTF) in the presence of (Me
4N)Ga(C
2
[...] Read more.
The synthesis, crystal structure, and conductivity of a solvent-included ternary charge-transfer salt (BEDT-TTF)
2GaCl
4(C
6H
5Cl)
0.5 (
1) is described and interpreted. Electrochemical oxidation of neutral bis(ethyelenedithio)-tetrathiafulvalene (BEDT-TTF) in the presence of (Me
4N)Ga(C
2O
4)Cl
2 in a mixture of C
6H
5Cl and C
2H
5OH 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) Å
3, 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) Å
3, 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, C
6H
5Cl chain is sandwiched by two GaCl
4− 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.
Full article