Ligand Substituent Effects on the Spin-Crossover Behaviors of Dinuclear Iron(II) Compounds
作者:Chun-Feng Wang、Zi-Shuo Yao、Guo-Yu Yang、Jun Tao
DOI:10.1021/acs.inorgchem.8b02789
日期:2019.1.22
compounds with the general formula [Fe2(xL)5(NCS)4]·yMeOH (x = o-Cl, y = 3 for compound 1; x = m-Cl, y = 5 for 2; x = p-Cl, y = 1 for 3; x = o-Me, y = 2 for 4; x = m-Me, y = 2 for 5; x = p-Me, y = 3 for 6; L = N-phenylmethylene-4-amino-1,2,4-triazole) were synthesized. The two Fe(II) ions are triply bridged by the triazole groups of three xL ligands and each Fe(II) is further capped with two NCS– groups
六种具有通式[Fe 2(x L)5(NCS)4 ]· y的类似物MeOH(x = o- Cl,对于化合物1为y = 3 ;x = m- Cl,对于2为y = 5 ;x=p- Cl,y= 1(3);x=o- Me,y= 2(4);x=m- Me,y= 2(5)。x = p- Me,y = 3等于6 ; L =N - N-苯基亚甲基-4-氨基-1,2,4-三唑)。两个的Fe(II)离子三重通过三个三唑基团桥连的X大号配体,并且每个的Fe(II)具有两个NCS被进一步封端的-基团和一个多X大号配体。这些化合物显示出在它们的磁特性有规律的模式依赖于该位置上的取代基(-Cl或-Me)乘,即邻位取代的化合物1和4经历完整的一步自旋交叉(SCO),而间位取代的化合物2和图5显示具有较低转变温度的不完整的一步式SCO,并且对位取代的化合物3和6在所有温度范围内均处于高自旋状态。结构分析表明,这些化合物的分