Transition metal complexes of pyridine-N-oxides

According to X-ray crystallography, the M-O-N angle is approximately 130° in many of these complexes.

As reflected by the pKa of 0.79 for C5H5NOH+, pyridine N-oxides are weakly basic ligands.

Their complexes are generally high spin, hence they are kinetically labile.

Zinc pyrithione is a coordination complex of a sulfur-substituted pyridine-N-oxide.

This zinc complex has useful fungistatic and bacteriostatic properties..[5]