The trans influence in unsymmetrical pincer palladacycles: an experimental and computational study

Boonseng, Sarote, Roffe, Gavin W, Jones, Rhiannon N, Tizzard, Graham J, Coles, Simon J, Spencer, John and Cox, Hazel (2016) The trans influence in unsymmetrical pincer palladacycles: an experimental and computational study. Inorganics, 4 (25). pp. 1-14. ISSN 2304-6740

[img] PDF - Published Version
Available under License Creative Commons Attribution.

Download (743kB)

Abstract

A 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.

Item Type: Article
Schools and Departments: School of Life Sciences > Chemistry
Subjects: Q Science > QD Chemistry
Q Science > QD Chemistry > QD0146 Inorganic chemistry
Q Science > QD Chemistry > QD0241 Organic chemistry
Depositing User: John Spencer
Date Deposited: 17 Aug 2016 06:39
Last Modified: 08 Mar 2017 17:05
URI: http://sro.sussex.ac.uk/id/eprint/62423

View download statistics for this item

📧 Request an update
Project NameSussex Project NumberFunderFunder Ref
UnsetUnsetThai GovernmentUnset