Crystal and molecular structure of the new anion-radical salts—(N-Me-2-NH2-Pz)(TCNQ)2 and (N-Me-Tetra-Me-Pz)(TCNQ)2 (Pz is pyrazine)

Spin-peierls transition in dimerized stacks of anion-radical salt (N-Me-2,5-di-Me-Pz)(TCNQ)2, (Pz is pyrazine)

“…The optical properties of this ARS were described recently [9]. The crystal structure of this ARS differs considerably from the crystal structure of (N-Me-2,6-di-Me-Pz)(TCNQ) 2 [10], although from the chemical point of view they differ only in the position of methyl groups in cation molecule.…”

“…This may result in structures unusual for TCNQ ARS. Using this approach, we have synthesized for the first time the quasi-two-dimensional TCNQ ARS of (N-Et-Pz)(TCNQ) 2.5 [4], (N-Et-2,5-di-Me-Pz)(TCNQ) 2 composition [5] and (N-Me-NH 2 -Pz)(TCNQ) 2 with dimeric cation [6].…”

Magnetic Properties of Anion-Radical Salts Based on TCNQ Anion Radical

“…Synthesis, crystal structure, IR absorption and electric conductivity studies were reported previously. It was shown that electrical conductivities of these two salts differ by three orders and the conductivity activation energy for both these ARS was estimated and compared with IR absorption spectra [4].…”

“…First quasi-two-dimensional salts with pyrazine based cation have been synthesized latterly [3]. Recently, first electric conductivity study of two novel ARS based on TCNQ (N-Me-2,5-di-Me-Pz)(TCNQ) 2 (A) and (N-Me-2,6--di-Me-Pz)(TCNQ) 2 (B) was presented [4].…”

Spin-Peierls Transition in (N-Me-Tetra-Me-Pz)(TCNQ)_{2}

“…The sample preparation method and the detailed crystallographical characterization of (N-Me-tetra-MePz)(TCNQ) 2 are given elsewhere [2]. The crystal struc- …”