Synthesis and structure of thienyl Fischer carbene complexes of Pt<sup>II</sup> for application in alkyne hydrosilylation
Lamprecht, Zandria; Malan, Frederick P.; Lotz, Simon; Bezuidenhout, Daniela I. (2021-03-16)
Lamprecht, Z., Malan, F. P., Lotz, S., & Bezuidenhout, D. I. (2021). Synthesis and structure of thienyl Fischer carbene complexes of PtII for application in alkyne hydrosilylation. New Journal of Chemistry, 45(14), 6220–6230. https://doi.org/10.1039/d1nj00791b
This journal is © The Royal Society of Chemistry and the Centre National de la Recherche Scientifique 2021. Open Access Article. Published on 16 March 2021. This article is licensed under a Creative Commons Attribution 3.0 Unported Licence.
https://creativecommons.org/licenses/by/3.0/
https://urn.fi/URN:NBN:fi-fe2021042927905
Tiivistelmä
Abstract
Transmetallation of group 6 thienylene Fischer carbene complexes to PtII precursors yielded new examples of neutral platinum(II) bisethoxycarbene complexes with either 2-thienyl (T) or 5-thieno[2,3-b]thienylene (TT) carbene substituents. The use of analogous aminocarbene group 6 precursors proceeded to give isomeric platinum(II) product mixtures where the resultant bisaminocarbene ligands displayed different orientations due to restricted rotation around the Pt–aminocarbene bond caused by the sterically demanding TT substituents. The well-defined PtII ethoxycarbene complexes were screened as catalyst precursors in the benchmark hydrosilylation reaction employing phenylacetylene and triethylsilane substrates. Marked selectivity for the β-E isomer (E)-triethyl(styryl)silane was observed, and the (pre)catalysts proved recyclable, active in solvent-free reactions, and displaying a high alkyne functional group tolerance.
Kokoelmat
- Avoin saatavuus [31937]