Trimethylscandium Synthesized

  • Author:
  • Published: 22 August 2019
  • 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: Trimethylscandium Synthesized

Metal methyl complexes of the type [M(CH3)n] are the simplest metalorganic complexes. However, they are not known for all metals. For example, there had been no such methyl complex of the rare-earth element scandium. Other rare-earth metals can form trimethyl compounds starting from the corresponding tetramethylaluminate complexes [M(AlMe4)3]. [Sc(AlMe4)3], however, had not been synthesized so far.

Reiner Anwander and colleagues, University of Tübingen, Germany, have synthesized both the required tetramethylaluminate precursor complex and trimethylscandium [ScMe3]n. The team reacted the complex [Li3ScMe6(thf)1.2] with AlMe3. The tetramethylaluminate product co-crystallizes with AlMe3 to give [Sc(AlMe4)3(Al2Me6)0.5]. This precursor can be converted to trimethylscandium by donor-induced aluminate cleavage. For this, the researchers added diethyl ether to a solution of [Sc(AlMe4)3(Al2Me6)0.5]. [ScMe3]n then precipitated as a white solid.

Trimethylscandium decomposes when exposed to air, water, or temperatures over –40 °C. It can be stabilized by the addition of trimethyltriazacyclononane (Me3TACN), which gives the complex [(Me3TACN)ScMe3]. This complex is stable enough to be structurally characterized.


Article Views: 1009

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

Bookmark and Share

If you would like to reuse any content, in print or online, from, please contact us first for permission. more

CONNECT: on Facebook on Twitter on YouTube on LinkedIn Sign up for our free newsletter

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