Binuclear Metal Complexes. XVI. Hetero Metal Binuclear Complexes with N,N′-Bis(3-carboxysalicylidene)ethylenediamine

Hetero metal binuclear complexes, MM′ (fsaen)·nH2O (M=Cu(II) and Ni(II); M′=Cu(II), Ni(II), Co(II), Fe(II), and Mn(II); n=1–3), with N,N′-bis(3-carboxysalicylidene)ethylenediamine (H4fsaen) have been synthesized and characterized, where M and M′ denote the metal ion coordinated by the N2O2-coordinating atoms and the O4-coordinating atoms, respectively. The magnetism of CuNi(fsean)·3H2O and CuCo(fsaen)·3H2O is explained in terms of the Heisenberg model. The magnetism of NiCu(fsaen)·H2O, NiCo(fsaen)·2H2O, and NiMn(fsaen)·2H2O obeys the Curie-Weiss law, demonstrating the binuclear structure to be composed of one diamagnetic nickel(II) and one paramagnetic M′(II) ions. CuFe(fsaen)·2H2O, NiFe(fsaen)·2H2O, and CuMn(fsaen)·H2O each shows unusual magnetic property.

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