One-dimensional Polynuclear Spin-crossover Iron(III)Complex Axially Bridged by 1,3-Bis(4-pyridyl)propane

摘要

A one-dimensional(1D)polynuclear spin-crossover Fe~(III)complex,[Fe~(III)(acacen)(bpyp)]_n(BPh_4)_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.