Solvent dependent C−H Bond Strength in a Nickel Pincer Complex. Issue 14 (4th May 2021)

• Record Type: Journal Article
• Authors: Schneck, Felix; Finger, Markus; Siewert, Inke; Schneider, Sven
• Is Part Of: Zeitschrift für anorganische und allgemeine Chemie. Volume 647:Issue 14(2021)
• Page Start: 1478
• Page End: 1485
• Publication Date: 2021-05-04
• Subjects: C−H Activation -- Proton Coupled Electron Transfer -- Nickel -- Pincer Complex -- Solvation; Chemistry, Inorganic -- Periodicals; Chemistry -- Periodicals; 540
• DOI: 10.1002/zaac.202100077
• Languages: English
• ISSNs: 0044-2313

Abstract

Abstract: Metal coordination can substantially weaken the bond strength of X−H bonds in coordinated ligands. Despite the importance for redox catalysis, this phenomenon is surprisingly scarcely examined for C−H bonds of organometallic compounds. We here report a nickel(I) pincer complex with a remote methylene group in the ligand backbone that exhibits an unusually solvent dependent C−H bond dissociation free energy (BDFEC−H ). Structural and thermochemical characterization in MeCN and THF indicates that the BDFEC−H strongly depends on solvent binding to the metal within the Ni II /Ni I redox couple. Abstract :