Beyond the intradimer [2 + 2] cycloaddition chemistry of ethylene on Si(1 0 0): theoretical evidence on the occurrence of interdimer reaction

Density functional cluster model calculations reveal that in addition to the well-accepted intradimer [2 + 2] cycloaddition, interdimer [2 + 2] cycloaddition as well as the parallel end-bridge mode adsorption should play an important role in the technologically important alkene/Si(1 0 0) chemistry.