Isomorphous bi- and mononuclear iron(III) complexes, [FeIII2L2(bimb)](BPh4)2 (1) and [FeIIIL(meim)]BPh4 (2), where H2L = bis(3-methoxysalicylideneaminopropyl)amine, bimb = 1,4-bisimidazolylbutane, meim = N-methylimidazole, and BPh4− = tetraphenylborate, respectively, were synthsized. Binuclear complex 1 showed a two-step spin-crossover (SCO) behavior at T1⁄2=60 and 90 K, whereas mononuclear complex 2 showed a one-step SCO behavior at T1⁄2=215 K. The different SCO behavior can be ascribed to the quasi-one-dimensional structure constructed by π–π stacking and the binuclear structure.
                                    合成了同素异形体双核和单核
铁(III)配合物,[FeIII2
L2(bimb)](BPh4)2 (1)和[FeIIIL(meim)]BPh4 (2),其中H2L=双(3-甲氧基
水杨醛基
氨基丙基)胺,bimb=1,4-
双咪唑基
丁烷,meim=
N-甲基咪唑,BPh4−=四苯基
硼酸盐。二核配合物1在T1⁄2=60和90 K时表现出两步自旋交叉(SCO)行为,而单核配合物2在T1⁄2=215 K时表现出一步SCO行为。不同的SCO行为可归因于π-π堆积和二核结构构成的准一维结构。