[Fe(isonitroso-5-methyl-2-hexanone)2*H2O]

iron(II) oxalate

carboxyiron

[Fe(II)(2-(N-α-pyrrolideneimino)ethane sulphonic acid)(H2O)3]

[Fe(II)(O-(N-α-pyrrolideneimino)benzene sulphonic acid)(H2O)3]