Tetrathiafulvalene. XIX. Synthese und Eigenschaften elektronenleitender Poly‐Dithiolenkomplexe mit Ethylentetrathiolat und Tetrathiafulvalentetrathiolat als Brückenliganden

Tetrathiafulvalenes. XIX. Synthesis and Properties of Electron Conducting Poly‐Dithiolene Complexes with Ethylene Tetrathiolat and Tetrathiafulvalene Tetrathiolat as Bridge Ligands[1,3]‐Dithiolo[4,5‐d]‐1,3‐dithiol‐2,5‐dione7and 5‐(5‐oxo[1,3]‐dithiolo[4,5–d]1,3‐dithiole‐2‐ylidene)[1,3]‐dithiolo[4,5–d]1,3–dithiol‐2‐one8were synthesised from 1,3‐dithiole‐2‐thione‐4,5‐dithiolat. The ligands react with salts of iron, cobalt, nickel, palladium, platinum and copper to give the polymer complexes22a–gand23a–e, respectively. Irradiation of7in the presence of iron penta‐, dicobalt octa‐ or nickel tetracarbonyl gives the corresponding dithiolene complexes21a–c.The amorphous insoluble polymer complexes from types21, 22, and23have been characterised by i.r.‐spectroscopy, susceptibility and conductivity measurements.The nickel complexes have the highest electrical conductivity (σRT∼ 10−1Ω−1cm−1, pellets) with a very low activation energy (0,045 eV, 100–300 K)A high electron delocalization in the direction of the polymer chain and an easy charge transfer from chain to chain is supposed.

Tetrathiafulvalene. XIX. Synthese und Eigenschaften elektronenleitender Poly‐Dithiolenkomplexe mit Ethylentetrathiolat und Tetrathiafulvalentetrathiolat als Brückenliganden Journal Articles