Physical properties of (BMDT-TTF)3AsF6(1,1,2-trichloroethane)

(BMDT-TTF)3AsF6(1,1,2-trichloroethane) featured with weakly trimerized BMDT-TTF units shows semiconductive resistivity behavior with a discontinuous change of a phase transition at 220K. The susceptibility described with a localized spin (s=l/2) per trimer shows a broad maximum of magnetic short-range ordering around 12K, while the thermoelectric power is temperature-independent ranging 70μV/K. These features of strongly-correlated-electron system is discussed in terms of donor trimers.