Friday, 2 September 11:00am – 12:00pm

This seminar will be delivered in Chemistry Lecture Theatre 4 and Online Zoom Please email chemistry.researchsupport@sydney.edu.au for zoom link and password.

Speaker: Prof. Vinh Huynh; National University of Singapore (NUS)

Host: Prof. Rich Payne

Title: The Huynh Electronic Parameter (HEP) and its Applications

Abstract: The properties, reactivities and applications of metal complexes are mainly determined by the stereoelectronic properties of the ligands. Thus, the accurate determination of these is of great importance to coordination chemistry and the applications of complexes. While the sterics of a ligand can be easily estimated by its structure, the comparison of their donor strength is less straightforward. Electronic Parameters developed by Tolman (TEP) and Lever (LEP) are separately used in organometallic and classical Werner-type coordination chemistry, respectively. However, ligands appearing in both parameters are limited, and a direct comparison can often not be made. To overcome these limitations, we have introduced a convenient, safe, and non-destructive electronic parameter for the systematic evaluation and comparison of both Werner-type and organometallic ligands using 13C NMR spectroscopy of stable PdII and AuI NHC complexes.1,2 Our parameter known as the Huynh Electronic Parameter (HEP) has also been extended to bidentate ligands (HEP2).3 The workings of HEP, some current developments and selected applications will be highlighted.4-6

Reference:

1. Huynh, H. V.; Han, Y.; Jothibasu, R.; Yang, J. A. Organometallics 2009, 28, 5395-5404.
2. Guo, S.; Sivaram, H.; Yuan, D.; Huynh, H. V. Organometallics 2013, 32, 3685-3696.
3. Teng, Q.; Huynh, H. V. Inorg. Chem. 2014, 53, 10964-10973.
4. Teng, Q.; Huynh, H. V. Dalton Trans. 2017, 46, 614-627.
5. Huynh, H. V. Chem. Rev. 2018, 118, 9457-9492.
6. Huynh, H. V. Chem. Lett. 2021, 50, 1831-1841.

Biography: Han Vinh Huynh completed his doctoral degree (Dr. rer. nat.) in 2002 at the University of Münster, Germany, under the supervision of Professor F. E. Hahn, where he studied the coordination chemistry of polythiolato ligands. He then joined the Department of Chemistry at the National University of Singapore (NUS) as a Feodor-Lynen Research Fellow by the Alexander von Humboldt-Foundation embarking on the study of Nheterocyclic carbenes and related species. In 2007, he became Assistant Professor and was promoted to Associate Professor in 2011. His research areas include organic, physical organic and organometallic chemistry with particular focus on the study of carbenes and their applications.