Crystal and molecular structure of the complex formed by Co(III) with dehydrogenated ?-hydroxylaminooxime anions and pyridine

Structural and spectroscopic comparisons of the square-planar four-coordinate [o-phenylenebis(biuretato)]cobaltate(III) complex and the five-coordinate mono- and six-coordinate dicyano adducts

“…This fact indicates that the Co-N bond length of the Co(bbphen) moiety is more sensitive to the coordination number than the total charge, as stated by the third bond variation rule. 14 The same trend is seen in bis(oximato)cobalt() complexes with pyridine 15 or iodide, 16 although each of these complexes contains a different equatorial tetradentate oximato derivative. Systematic changes in the bond lengths due to the coordination number of Co III are also observed for the N-C and C᎐ ᎐ O bonds of the biuretato moiety.…”