Molecular modifications of methylenedithio-tetraselenafulvalene (MDT-TSF) and methylenedithio-diselenadithiafulvalene (MDT-ST) for superior electron donors

The dimethyl-, bis(methylthio)-, and ethylenedithio-derivatives of methylenedithio-tetraselenafulvalene and methylenedithio-diselenadithiafulvalene have been synthesized as new electron donors. The formation and electrical conductivities of their radical cation salts are examined.