Abstract
AbstractStructural studies on (R*3Si4)2SiCl2, prepared by the reaction of tetrasilatetrahedranide KR*3Si4 with SiCl4, show that the tetrahedral moieties R*3Si4 undergo structural transformation. The molecule exhibits a spiro[4.4]nonasilane network that comprises two homonuclear tricyclo[2.1.0.02,5]pentasilane rings with a common “naked” silicon bridge. The compound shows structural similarities with R*6Si8, which consists of similar rings fused together along an Si–Si bridge. Comparison of valence angles, interplanar angles and bridgehead distances with respect to tricyclo[2.1.0.02,5]pentanes or similar ring systems with heteronuclear group homologues are reported to highlight the influence of bulky supersilyl R* groups in the structure.
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