Abstract
AbstractThe reduction of R*–SiBr2–SiBr2–R* (2) with NaR* (R* = supersilyl = SitBu3) in presence of C2H4 provides a white crystalline solid (η2‐C2H4)R*Si–SiR*(Br)(CH2–CH2–R*) (3) characterized by X‐ray diffraction analysis. Compound 3 is accompanied with an impurity of R*(Br)2Si–Si(Br)(R*)(CH2–CH2–R*) (4). The formation of 3 and 4 runs complicated because of several reactive partners. However, reduction of 2 with sodium naphthalenide in presence of ethene runs straightforward with formation of a mixture of tetrahedrane R*4Si4 (1) and bis(silirane) R*(η2‐C2H4)Si–Si(η2‐C2H4)R* (5). The latter is formed by [1+2]‐cycloaddition reaction of intermediate disilyne R*Si≡SiR* with ethene. Compound 5 has been characterized by X‐ray structure determination. The 1H NMR spectrum of the silacyclopropane ring protons shows AA′BB′ complex spectrum comprising of 2 sets each of 12 transitions.
Published Version
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