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The trans influence in unsymmetrical pincer palladacycles: an experimental and computational study
journal contribution
posted on 2023-06-09, 02:35 authored by Sarote Boonseng, Gavin W Roffe, Rhiannon N Jones, Graham J Tizzard, Simon J Coles, John SpencerJohn Spencer, Hazel CoxHazel CoxA library of unsymmetrical SCN pincer palladacycles, [ClPd{2-pyr-6-(RSCH2)C6H3}], R = Et, Pr, Ph, p-MePh, and p-MeOPh, pyr = pyridine, has been synthesized via C–H bond activation, and used, along with PCN and N’CN unsymmetrical pincer palladacycles previously synthesized by the authors, to determine the extent to which the trans influence is exhibited in unsymmetrical pincer palladacycles. The trans influence is quantified by analysis of structural changes in the X-ray crystal and density functional theory (DFT) optimized structures and a topological analysis of the electron density using quantum theory of atoms in molecules (QTAIM) to determine the strength of the Pd-donor atom interaction. It is found that the trans influence is controlled by the nature of the donor atom and although the substituents on the donor-ligand affect the Pd-donor atom interaction through the varied electronic and steric constraints, they do not influence the bonding of the ligand trans to it. The data indicate that the strength of the trans influence is P > S > N. Furthermore, the synthetic route to the family of SCN pincer palladacycles presented demonstrates the potential of late stage derivitization for the effective synthesis of ligands towards unsymmetrical pincer palladacycles.
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Thai Government
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- Published
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- Published version
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InorganicsISSN
2304-6740Publisher
MDPIExternal DOI
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25Volume
4Page range
1-14Department affiliated with
- Chemistry Publications
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- Yes
Peer reviewed?
- Yes
Legacy Posted Date
2016-08-17First Open Access (FOA) Date
2016-08-17First Compliant Deposit (FCD) Date
2016-08-16Usage metrics
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