Abstract

Carbamoylmethylthio-substituted TTF-based donors afforded inclusion-type salts with a BF₄ counter ion or an F₄-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. On the other hand, F₄-TCNQ acceptors are stacked in a channel created by a stair-like arrangement of donor chains. The thermally activating magnetic susceptibility of the F₄-TCNQ complex was interpreted in terms of a double-chain frustrated spin system.