Stable Five-and Six-Coordinate Cobalt(III)Complexes with a Pentadentate Bispidine Ligand

摘要

Cobalt(III)complexes are classics in coordination chemistry,and pentaamine as well as hexaamine Co~(III)complexes generally have a low-spin d6 electronic configuration with little distortion from an ideal octahedral coordination geom-etry.Among the 2859 X-ray structures of{Co~(III)(N)5(X)_n}species(n=0,1)in the CSD there are only 18 pentacoordi-nate complexes(n=0).