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Cyano-Bridged MnIII3MIII (MIII = Fe, Cr) Complexes: Synthesis, Structure, and Magnetic Properties
journal contribution
posted on 2005-08-22, 00:00 authored by Hitoshi Miyasaka, Hitomi Takahashi, Tomokura Madanbashi, Ken-ichi Sugiura, Rodolphe Clérac, Hiroyuki NojiriTwo cyano-bridged tetranuclear complexes composed of Mn(III)
salen (salen = N,N‘-ethylene bis(salicylideneiminate)) and hexacyanometalate(III) (M = Fe, Cr) in a stoichiometry of 3:1 have been
selectively synthesized using {NH2(n-C12H25)2}3[MIII(CN)6] (MIII =
Fe, Cr) starting materials: [{Mn(salen)(EtOH)}3{M(CN)6}] (M =
Fe, 1; Cr, 2). Compounds 1 and 2 are isostructural with a T-shaped
structure, in which [M(CN)6]3- assumes a meridional-tridentate
building block to bind three [Mn(salen)(EtOH)]+ units. The strong
frequency dependence and observation of hysteresis on the field
dependence of the magnetization indicate that 1 is a single-molecule magnet.