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Reductive Cleavage of Carbon Monoxide by a Disilenide |
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| Authors: | Dr Moumita Majumdar Dipl‐Chem Isabell Omlor MSc Cem B Yildiz Prof?Dr Akin Azizoglu Dr Volker Huch Prof?Dr David Scheschkewitz |
| Affiliation: | 1. Krupp‐Chair of General and Inorganic Chemistry, Saarland University, 66125 Saarbrücken (Germany) http://www.uni‐saarland.de/fak8/scheschkewitz/index.html;2. New address: Department of Chemistry, Indian Institute of Science Education and Research (IISER), Pune‐411008 (India);3. Department of Chemistry, Faculty of Science and Letters, University of Balikesir, 10145 Bal?kesir (Turkey) |
| Abstract: | The complete reductive cleavage of the triple bond in carbon monoxide was achieved using a lithium disilenide at room temperature. The C? C‐coupled product can be regarded as a silanone dimer with pending alkyne and silirene moieties and incorporates two equivalents of CO per disilenide unit. A formation mechanism via ketenyl intermediates is proposed on the basis of DFT calculations and elucidated experimentally by employing Group 6 metal carbonyls as both stabilizing entity and source of CO in the reaction with disilenide. The isolation of cyclic silylene complexes with weakly donating ketenyl donor groups further supports the mechanistic scenario. |
| Keywords: | carbon monoxide C C coupling ketenylidenes reduction silylene complexes |
