Synthesis and molecular structures of 1‐boracyclopent‐2‐enes |
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Authors: | Ezzat Khan Rhett Kempe Bernd Wrackmeyer |
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Institution: | Anorganische Chemie II, Universit?t Bayreuth, D‐95440 Bayreuth, Germany |
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Abstract: | The reaction of 1‐silyl‐1‐borylalkenes with alkyn‐1‐yltin compounds affords borol‐2‐enes, organometallic‐substituted allenes, mixtures thereof or even more complex mixtures with buta‐1,3‐dienes, depending on the third substituent at the C?C bond (Bu or Ph), on the number of Si? Cl functions (two or three) and the nature of the alkyn‐1‐yltin compound. Six new borol‐2‐enes were isolated in pure state, and two of them were characterized by X‐ray structural analysis. The solution‐state structures of all major products were clearly established by multinuclear magnetic resonance methods (1H, 11B, 13C, 29Si, 119Sn NMR). Copyright © 2009 John Wiley & Sons, Ltd. |
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Keywords: | organoboration silanes stannanes borol‐2‐enes allenes NMR X‐ray |
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