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submitted on 27.11.2019 and posted on 06.12.2019by Ethan A. Hill, Norman Zhao, Alexander S. Filatov, John Anderson
We report four-coordinate
nickel(II)-methyl complexes of tris-carbene borate ligands which adopt rare seesaw
geometries. Experimental and computational results suggest the structural
distortion from threefold symmetry results from a combination of electronic
stabilization of the singlet state, strong field donors, and constrained angles
from the chelating ligand.