A bi-TTF with a bipyridine spacer: 4,4′-bis[(3,6,7-trimethylsulfanyltetrathiafulvalen-2-yl)sulfanylmethyl]-2,2′-bipyridine

Abstract

The title compound, C30H28N2S16, is a precursor to hybrid magnetic materials. The complete molecule is generated by a crystallographic inversion centre. In the crystal structure, the TTF core is not planar and adopts a chair conformation; the two C3S2 rings are folded around the S⋯S hinges, the dihedral angles being 17.14 (8) and 13.46 (7)°. There is a short S⋯S contact [3.4863 (14) Å] in the crystal structure.

Donor–acceptor complex of a new bis-TTF donor containing a pyridine diester spacer with TCNQ as the acceptor: a disappointing system

“…In the past decade, extended TTF systems have received much attention as building blocks potentially able to enhance the dimensionality in derived conducting materials (Bryce, 1995;Iyoda, 2004;Lorcy et al, 2009). Following a similar strategy, we have developed a research programme based mainly on bis-TTF, in which the TTF cores are linked by various functionalized spacers (Bouguessa et al, 2003;Carcel et al, 2006;Kaboub et al, 2008;Kaboub, 2009). As part of this research programme, we have synthesized a new bis-TTF donor compound, (3) (see Scheme), in which ester functionalities have been introduced within the covalent spacer linking the two TTF units to give bis[(6,7-tetramethylene-3-methylsulfanyltetrathiafulvalenyl)-2-ethylsulfanyl]pyridine-2,6-dicarboxylate [abridged name hereinafter: bis-TTF(pyridine diester)].…”