Labilizing the Photoinert: Extraordinarily Facile Photochemical Ligand Ejection in an [Os(N^N)3 ](2+) Complex

Paul A Scattergood; Daniel A W Ross; Craig R Rice; Paul I P Elliott

doi:10.1002/anie.201604959

Labilizing the Photoinert: Extraordinarily Facile Photochemical Ligand Ejection in an [Os(N^N)3 ](2+) Complex

Angew Chem Int Ed Engl. 2016 Aug 26;55(36):10697-701. doi: 10.1002/anie.201604959. Epub 2016 Aug 3.

Authors

Paul A Scattergood¹, Daniel A W Ross¹, Craig R Rice¹, Paul I P Elliott²

Affiliations

¹ Department of Chemistry, University of Huddersfield, Huddersfield, UK.
² Department of Chemistry, University of Huddersfield, Huddersfield, UK. p.i.elliott@hud.ac.uk.

PMID: 27485699
DOI: 10.1002/anie.201604959

Abstract

Whilst [Os(N^N)3 ](2+) complexes are supposed to be photochemically inert to ligand loss, the complex [Os(btz)3 ](2+) (btz=1,1'-dibenzyl-4,4'-bi-1,2,3-triazolyl) undergoes unprecedented photolytic reactivity to liberate free btz (Φ363 ≈1.2 %). Further, both cis and trans isomers of the photodechelated ligand-loss solvento intermediate [Os(κ(2) -btz)2 (κ(1) -btz)(NCMe)](2+) are unambiguously observed and characterized by NMR spectroscopy and mass spectrometry.

Keywords: complexes; isomers; osmium; photochemistry; triazole.

Publication types

Research Support, Non-U.S. Gov't