The title compound was obtained during the crystal growth of two kappa
-type superconductors, kappa-(BEDT-TTF)(2)Cu(CN)[N(CN)(2)] and kappa'-
(BEDT-TTF)(2) Cu-2(CN)(3). This compound is a magnetic semiconductor,
whose spin susceptibility is expressed by quadratic-layer Heisenberg a
ntiferromagnet model (QLAF) between 32.6K and 220K. At 220K, a semicon
ductor-semiconductor transition into a high conductivity phase was obs
erved by transport measurements.