Magnetic Suscepttbility Evidence for a Binuclear Iron Complex in Hemerythrin

Magnetic susceptibilities have been determined for oxy, deoxy, and several met derivatives of hemerythrin. Below 205 °K all the methemerythrin derivatives were very clearly diamagnetic. These findings directly support long-standing ideas that the two iron atoms per hemerythrin monomer are sufficiently closely linked to form an antiferromagnetically coupled pair. © 1971, American Chemical Society. All rights reserved.