Synthesis, structure and magnetic property of an 'adamantane' type tetranuclear iron(III) complex

摘要

A new tetranuclear complex [Fe4L2(mu-O)(2)(mu-OH)(2)]-(ClO4)(4)(H2O)-H-. (1), (HL = N,N,N',N'-tetrakis-[(2-pyridyl)methyl]-2-hydroxypropane-1,3-diamine) has been synthesized and its crystal structure and magnetic properties are shown. X-ray crystallography reveals that complex 1 contains a quadruply-charged, tetranuclear iron(III) cation and four perchlorate anions. In 1, the Fe4O6 core is composed of a tetrahedron of iron atoms bridged by six oxygen atoms (two oxo, two hydroxo, and two alkoxo groups from L). This results in an adamantane-type geometry with the iron atoms occupying the bridgehead positions. Susceptibility data of 1 indicate strong intramolecular anti ferromagnetic coupling of high-spin Fe-III atoms.