CANCELLED: Department Seminar, Dr. Matthias Drieß, Technical University Berlin
May 4, 2023
1280 Main St. W., Hamilton, Canada
1:30PM to 2:30PM
Date(s) - 04/05/2023
1:30 pm - 2:30 pm
Our May 4 seminar is cancelled due to unforeseen circumstances. Thanks for your understanding.
Please join us on May 4 for a department seminar delivered by Dr. Matthias Drieß of the Technical University Berlin.
This presentation will be available in in-person only.
Title: Entering New Chemical Space with Isolable Bis-silylenes
Date: Thursday, May 4, 2023
Room: ABB 165
Hosts: David Emslie and Mike Brook
Abstract: Recently, a variety of isolable N-heterocyclic silylenes were realized, which show a non-trivial versatile reactivity pattern with respect to selective carbon-heteroatom bond activation of organic substrates based on divalent silicon. Over the last few years we have shown that the reactivity of silylenes can be significantly enhanced towards very stable small molecules if two silylene moieties are placed in close proximity in the same molecular entity, giving rise to cooperative bond activation. These striking features will be demonstrated with a variety of bis-silylene compounds (and compared with related bis-phosphines and carbenes) bearing different spacers. Moreover, the particularly strong Lewis-donor abilities of bis-silylenes enable the stabilization of transition-metals and main-group elements in unusual low oxidation states which even enable new chemical space in homogeneous catalysis [1,2] and realization of organosilicon-based triplet diradicals (molecular magnets). 
 Review: C. Shan, S. Yao, M. Driess, Chem. Soc. Rev. 2020, 49, 6733-6754.
 Perspective article: S. Yao, Y. Xiong, A. Saddington, M. Driess, Chem. Commun., 2021,57, 10139-10153.
 Y. Xiong, S. Dong., S. Yao, C. Lorent, K. Krause, G. Vijakumer, J. Zhu, C. Limberg, M. Driess, Nat. Synthesis 2023, DOI: https://doi.org/10.1038/s44160-023-00279-6.