Asymmetric bis-PNP pincer complexes of zirconium and hafnium - a measure of hemilability

Celia Idelson; Leah Webster; Tobias Krämer; F Mark Chadwick

doi:10.1039/d0dt03544k

Asymmetric bis-PNP pincer complexes of zirconium and hafnium - a measure of hemilability

Dalton Trans. 2020 Dec 8;49(46):16653-16656. doi: 10.1039/d0dt03544k.

Authors

Celia Idelson¹, Leah Webster, Tobias Krämer, F Mark Chadwick

Affiliation

¹ Department of Chemistry, Molecular Sciences Research Hub, Imperial College London, White City, Shepherds Bush, London, W12 0BZ, UK. m.chadwick@imperial.ac.uk.

PMID: 33191415
DOI: 10.1039/d0dt03544k

Abstract

Asymmetrically-bound pyrrolide-based bis-PNP pincer complexes of zirconium and hafnium have been formed. The [κ2-PNPPh][κ3-PNPPh]MCl2 species are in direct contrast to previous zirconium PNP pincer complexes. The pincer ligands are fluxional in their binding and the energy barrier for exchange has been approximated using VT-NMR spectroscopy and the result validated by DFT calculations.