One-dimensional Polynuclear Spin-crossover Iron(III) Complex Axially Bridged by 1,3-Bis(4-pyridyl)propane
2006
A one-dimensional (1D) polynuclear spin-crossover Fe III complex, [Fe III (acacen)(bpyp)]n(BPh4)n, showed a gradual and complete SC over a wide temperature range of ca. 250 K between S = 5/2 and S = 1/2, where acacen = N,N'-bis(acetyl-acetonato)ethylenediamine, bpyp = 1,3-bis(4-pyridyl)propane, and BPh 4 - = tetraphenylborate. The single-crystal X-ray structures in the HS, LS, and midpoint between the HS and LS states were determined, and demonstrated that the SC may occur through the alternately arrayed HS- and LS-chains.
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