(BTDM-TTF)-TCNQ complex, a new organic metal

Abstract Single crystals of the charge-transfer complex (BTDM-TTF)-TCNQ, showing metallic character down to 26K, have been obtained. The X-Ray structure reveals segregated stacks of donors and acceptors in a very similar packing with the related HMTSF-TCNQ complex. Electronic structure calculations using a tight-binding model indicate that (BTDM-TTF)-TCNQ is an almost pure ID metal. The electronic and magnetic properties are in accordance with its electronic and structural characteristics. This complex shows the lowest transition temperature reported up to date for charge transfer complexes of TTF derivatives.