Main group organometallic compounds can exhibit unusual optical properties arising from hybrid σ,π-conjugation. While linear silanes are extensively studied, the shortage of methods for the controlled synthesis of well-defined cyclic materials has precluded the study of cyclic conjugation. Herein we report that Ru-catalyzed addition of cyclosilanes to aryl acetylenes (hydrosilylation) proceeds with high chemoselectivity, regioselectivity, and diastereoselectivity, affording complex organosilanes that absorb visible light. We further show that the hydrosilylation products are useful building blocks towards novel conjugated polymers.

中文翻译：

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将环硅烷高度选择性地添加到炔烃中，可实现新的共轭材料

主族有机金属化合物可以表现出由杂化 σ,π-共轭引起的不同寻常的光学性质。虽然对线性硅烷进行了广泛研究，但由于缺乏控制合成明确环状材料的方法，阻碍了对环状共轭的研究。在本文中，我们报告了 Ru 催化的环硅烷与芳基乙炔的加成（氢化硅烷化）具有高化学选择性、区域选择性和非对映选择性，从而提供了吸收可见光的复杂有机硅烷。我们进一步表明，氢化硅烷化产物是制备新型共轭聚合物的有用构件。