Haem-Fe and cobalamines-Co are not recognised by the CDKAtomTypeMatcher. I'm not sure if they are salts (there is a patch for Co3+ in the tracker). For example, here is PDB ligand code 1FH (a haem):
and here is PDB ligand code COB (a cobalamine):
note that the liganding nitrogens are all recognised as N.planar3 in 1FH, but one of the 4 nitrogens around the Co in COB is also null. Confusingly the other 3 liganding nitrogens in COB are of type N.sp2.3.