Organometallic Ni(II), Ni(III), and Ni(IV) complexes relevant to carbon-carbon and carbon-oxygen bond formation reactions

Abstract

Herein, the pyridinophanetetradentate ligand 3,6,9-trimethyl-3,6,9,15-tetraazabicyclo[9.3.1]pentadeca-1(15),11,13-triene, PyNMe3, is used to isolate and structurally characterize well-defined organometallic Ni(II) and Ni(III) complexes bearing the cycloneophyl fragment, an alkyl/aryl C-donor ligand. Furthermore, spectroscopic and cryo-mass spectrometry studies suggest the formation of a transient Ni(IV) organometallic complex, and its relevance to C-C and C-O bond formation reactivity studies is discussed

We acknowledge financial support from NSF CHE-1925751 to L.M., MINECO-Spain for projects PID2019-104498GB-I00 to X.R., PID2019-106699GB-I00 to A.C. Generalitat de Catalunya is also acknowledged for project 2017SGR264