Tetrathiafulvalene. VII [1]. Arylenverbrückte polymere Tetrathiafulvalene

Tetrathiafulvalenes. VII. Arylene-bridged Polymeric Tetrathiafulvalenes Synthesis and properties of phenylene — and biphenylbridged polymeric tetrathiafulvalenes, which are substituted by two methyl-groups in the 3- and 6-position, are described. These polymers react with bromine, iodine or tetracyanoquinodimethane to form the radical cation salts, whose electrical conducticity are estimated by means of powder compactions. The differences in the conductivity of the TCNQ-salts and radical cation halides are very small. The phenylene-bridged polymer-salts show a higher conductivity than the bi-phenylylene-bridged ones up to values of 10⁻³Ω⁻¹ cm⁻¹. Surprisingly the monomer salts have a lower conductivity than the polymer salts.