Decamethyl- and octamethyl-ferrocenium salts of F1- and F2-TCNQ: Effects of fluorine substitution on the crystal structures and magnetic interactions
作者:Yusuke Funasako、Tomoyuki Mochida、Takahiro Akasaka、Takahiro Sakurai、Hitoshi Ohta、Yutaka Nishio
DOI:10.1016/j.ica.2014.05.011
日期:2014.8
octamethyl-ferrocenium salts of FnTCNQ (n = 1, 2) were prepared and their crystal structures characterized. The 2,5-F2TCNQ salts [Fe(C5Me5)2](2,5-F2TCNQ) (1) and [Fe(C5Me4H)2](2,5-F2TCNQ) (2) exhibit one-dimensional …[D]+[A]−[D]+[A]−… mixed-stack structures, while the salts with polar acceptors [Fe(C5Me5)2][A] (A = F1TCNQ (3), 2,3-F2TCNQ (4), 2,6-F2TCNQ (5)) and [Fe(C5Me4H)2][A] (A = 2,3-F2TCNQ (6), 2,6-F2TCNQ
摘要制备了FnTCNQ(n = 1,2)的十甲基和八甲基二茂铁盐,并对其晶体结构进行了表征。2,5-F2TCNQ盐[Fe(C5Me5)2](2,5-F2TCNQ)(1)和[Fe(C5Me4H)2](2,5-F2TCNQ)(2)显示一维…[D] + [A]-[D] + [A]-…混合堆叠结构,而带有极性受体[Fe(C5Me5)2] [A]的盐(A = F1TCNQ(3),2,3-F2TCNQ(4 ),2,6-F2TCNQ(5)和[Fe(C5Me4H)2] [A](A = 2,3-F2TCNQ(6),2,6-F2TCNQ(7))由[D] + [涉及受体的反磁性二聚体的A2] 2- [D] +单元。这些盐与相应的TCNQ盐同构。图1和图2在低温下表现出小的铁磁相互作用。图1的反铁磁相变在TN = 3.9 K,高于[Fe(C5Me5)2](TCNQ)的亚磁性多晶型物的TN = 2.1K。