Cyanide- and phenoxo-bridged heterobimetallic Fe(III)-Mn(III) complexes: Synthesis, crystal structures and magnetic properties

作者：Zhang Daopeng^*; Wang Ping; Chen Kexun; Chen Xia

来源：Journal of Chemical Sciences, 2014, 126(6): 1665-1671.

• Cyanide-bridged
• heterobimetallic
• crystal structure
• magnetic property

By employing two mer-tricyanidoiron(III) precursors [Ph4P] [Fe-III(pcq)(CN)(3)] and [Ph4P] [Fe-III (pzq)(CN)(3)] as building blocks and a salen-tpye Schiff-base manganese (III) compound as assembling segment, two tetranuclear cyanide- and phenoxo- bridged heterobimetallic Fe(III)-Mn(III) complexes {[Mn(saltmen)] [Fe(pcq)(CN)(3)]}(2)center dot 2CH(3)OH (1) and {[Mn(saltmen)] [Fe(pzq)(CN)(3)]}(2)center dot 2CH(3)OH (2) (pcq = 8-(pyridine-2-carboxamido, pzq = 8-(pyrazine-2-carboxamido, saltmen(2-) = N, N'-(1,1,2,2-tetramethylethylene)bis(salicylideneaminato)dianion) have been synthesized and characterized by elemental analysis, IR spectroscopy and X-ray structure determination. Single x-ray analysis reveals their isostructural cyanide-bridged Fe(III)-Mn(III) binuclear structure. The binuclear entity is self-complementary through phenoxo oxygen from the neighbouring complex, giving cyanide- and phenoxo- bridged tetranuclear structure. Furthermore, under the help of the intermolecular pi-pi interaction, these two complexes can be constructed into 1D infinite chain supramolecular structure. Investigation over magnetic susceptibilities reveals the overall ferromagnetic coupling between the adjacent Fe(III) and Mn(III) ions bridged by cyanide group with J = 5.34 cm(-1) and 5.55 cm(-1) for complexes 1 and 2, respectively.

• 单位
  山东理工大学