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The compound [Cy 7 Si 7 O 12 BeLi] 2 .2THF (3) was prepared in high yield by reacting in situ prepared Cy 7 Si 7 O 9 (OLi) 3 (2) with anhydrous BeCl 2 in THF at 20 o C. The molecular structure of 3 has been determined by X-ray diffraction and is the first structurally characterized silsesquioxane derivative of beryllium...
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