Iron(II) octaethyltetraazaporphyrin, FeOETAP, a canted ferromagnet with Tc = 5.6 K


  • We thank the National Institute of Standards and Technology (NIST) in Boulder, CO, for use of their SQUID magnetometer and R. G. Goldfarb for technical assistance and helpful discussions. We acknowledge J. S. Miller and R. S. McLean for preliminary results. This work was supported by the University of Colorado at Boulder and the Army Biomedical Research and Development Laboratory.


A four-coordinate azaporphyrin, FeOETAP (see Figure), is reported that has temperature- and field-dependent properties different from those of other fourcoordinate iron(II) porphyrins and related macrocycles, displaying an apparent canted ferromagnetic state. This behavior is compared to that of M2⊕(OETAP), where M = Mn, Co, Ni, Cu, and Zn.

original image