First synthesis of a dihydrido functionalized double-cored oligosilane dendrimer |
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| Authors: | Clemens Krempner S. Chtchian |
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| Affiliation: | a Department of Chemistry, The Ohio State University, 100 W. 18th Avenue, Columbus, OH 43210, USA
b Fachbereich Chemie der Universität Rostock, A.-Einstein-Str. 3a, Rostock 18059, Germany |
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| Abstract: | The reaction of (R2MeSi)2SiHCl (2) [R=SiMe3] with Na-K-alloy yields the double-cored dendritic oligosilane [(R2MeSi)2SiH]2 (4). The structure of 4 was obtained from X-ray diffraction data, which verify a total of 14 silicon atoms and a longest chain of six silicon atoms. The UV-Vis spectra of 4 and the structurally analogous [(R2MeSi)2SiMe]2 (5) exhibit absorption maxima (shoulders) at 269 nm (ε=2.0×104) and 276 nm (ε=2.3×104), respectively, which are the longest so far observed for alkyl substituted oligosilanes with hexasilane chains. |
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| Keywords: | Silanes Oligosilanes Dendrimers Hexasilane σ-Conjugation |
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