Polycyclic oligosilanes are interesting silicon compounds because they have σ electrons of Si-Si bonds delocalized over a three-dimensional silicon framework which are often found in crystalline or amorphous silicon and related important silicon clusters. Although various types of polycyclic oligosilanes have been synthesized and investigated so far, there have been very few studies on catenated polycyclic oligosilanes (oligomers of polycyclic oligosilanes), which should show significant interactions between polycyclic oligosilane cages.
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