One-dimensional double chain composed of carbamoylmethylthio-substituted TTF-based donor in ion radical salt

Carbamoylmethylthio-substituted TTF-based donors afforded inclusion-type sa lts with a BF4 counter ion or an F-4-TCNQ acceptor. The crystal structures of these salts are characterized by a one-dimensional double chain composed of singly-oxidized donors via SOMO-SOMO interaction and side-by-side S ... S contacts. Counter ions of BF4 are hydrogen-bonded to the amide groups. O n the other hand, F-4-TCNQ acceptors are stacked in a channel created by a stair-like arrangement of donor chains. The thermally activating magnetic s usceptibility of the F-4-TCNQ complex was interpreted in terms of a double- chain frustrated spin system.