First Synthesis of a 1-Magnesium-2,3-Disilacyclopropene

  • Author:
  • Published: 26 February 2020
  • Copyright: Wiley-VCH Verlag GmbH & Co. KGaA
  • Source / Publisher: Journal of the American Chemical Society/ACS Publications
  • Associated Societies: American Chemical Society (ACS), USA
thumbnail image: First Synthesis of a 1-Magnesium-2,3-Disilacyclopropene

Silicon acts very differently from the lighter carbon in its multiply bonded compounds. Molecules with silicon–silicon double or triple bonds are much rarer than the corresponding carbon compounds and generally require bulky stabilizing groups. There are few examples of multiply bonded anionic silicon species, for example.

Chunming Cui, Nankai University, Tianjin, China, and colleagues have synthesized the first 1-magnesium-2,3-disilacyclopropene (pictured)—a magnesium complex of a dianionic disilyne. The team reduced the boryl ligand derivative (HCArN)2BSiBr3 (Ar = 2,6-iPr2C6H3) with activated magnesium in tetrahydrofuran (THF) to obtain the desired compound. The product was isolated as a yellow powder with a yield of 79 %.

The compound was characterized using 1H, 13C, and 29Si NMR spectroscopy, UV–Vis spectroscopy, and X-ray diffraction. The team found that it contains an unprecedented Mg–Si–Si three-membered ring. The silicon atoms have a nearly planar coordination. The structure and the results of density functional theory (DFT) calculations point to the existence of a Si═Si double bond. According to the team, the product could be useful for the synthesis of other new silicon compounds.



Article Views: 1893

Sign in Area

Please sign in below

Additional Sign In options

Please note that to comment on an article you must be registered and logged in.
Registration is for free, you may already be registered to receive, e.g., the newsletter. When you register on this website, please ensure you view our terms and conditions. All comments are subject to moderation.

Article Comments - To add a comment please sign in

If you would like to reuse any content, in print or online, from, please contact us first for permission and consult our permission guidance prior to making your request

Follow on Facebook Follow on Twitter Follow on YouTube Follow on LinkedIn Follow on Instagram RSS Sign up for newsletters

Magazine of Chemistry Europe (16 European Chemical Societies) published by Wiley-VCH