The aim of this article is to describe the results of our investigation on the chiral crystallization of anti -tricyclic ladder polysilane, anti -dodecaisopropyltricyclo [4.2.0.0 2,5 ]octasilane ( 1 ). In solid state, the silicon framework of 1 adopts twisted conformation in which the Si 4 rings are puckered in the same direction. Crystallization of 1 afforded a large conglomerate crystal in high yield. X-ray crystallography revealed that the crystal consists of either right-handed ( P ) or left-handed ( M ) molecules. The ultraviolet and circular dichroism spectra of the chiral crystals of 1 reveal two absorption bands in the 400-250 nm region.
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