New Et-Based Organic Superconductors With The Organometallic Anion Cu(Cf3)(4)(-)

Electrocrystallization of bis(ethylenedithio)tetrathiafulvalene (ET) with (PNP)Cu(CF3)(4) in 1,1,2-trichloroethane (TCE) results in two new superconductors, kappa(L)-(ET)(2)Cu(CF3)(4)(TCE), 1, with T-c = 4.0 K, and kappa(H)-(ET)(2)Cu(CF3)(4).(TCE)(x), 2, with T-c = 9.2 K. I forms well-developed plate-like crystals whose structure was determined by X-ray crystallography. Its band electronic structure is reported. The kappa(H)-phase forms long, thin needle bundles.