615569-94-3Relevant academic research and scientific papers
EPR study of intramolecular dynamics in o-semiquinonic nickel complexes with PCP-pincer ligand in solution
Kozhanov, Konstantin A.,Bubnov, Michael P.,Cherkasov, Vladimir K.,Fukin, Georgy K.,Abakumov, Gleb A.
, p. 2957 - 2962 (2004)
A number of square pyramidal o-semiquinonic nickel complexes with 2,6-bis(diphenylphosphraomethyl)phenyl were investigated by EPR spectroscopy in solution. The complexes have flexible coordination spheres and can exist in solution as two isomers rapidly (on the EPR timescale) interconverting one to another at room temperature. The equilibrium is entropy driven and does not significantly depend on the substituents in the semiquinone ring. The spin density distribution depends on mesomeric properties and bulkiness of substituents in ortho-position to oxygen atoms.
Suzuki-Miyaura Csp2-Csp2Cross-Couplings Employing Nickel(II) Pincer Precatalysts: Mechanistic Investigations
Ho, Curtis C.,Olding, Angus,Fuller, Rebecca O.,Canty, Allan J.,Lucas, Nigel T.,Bissember, Alex C.
supporting information, p. 2305 - 2310 (2021/05/06)
This study investigates the mechanism of Suzuki-Miyaura Csp2-Csp2cross-couplings facilitated by PCP-type nickel(II) pincer complexes. By employing a combination of standard experimental and theoretical methods, it is proposed that a nickel(I)/(III) cycle is involved in this reaction and single-electron pathways likely operate in this transformation.
