<i>N</i>
,
<i>N′</i>
‐Bis(2,2′‐bipyridine‐6‐ylmethyl)‐2,2′‐biphenylenediamines: A Tuneable Ligand Scaffold for Room Temperature Fe
<sup>2+</sup>
SCO Complexes
作者:Holm Petzold、Silvio Heider
DOI:10.1002/ejic.201001139
日期:2011.3
reduction of 2,2′-diaminobiphenyls 5 with 6′- and 5′-substituted 6-carbaldehyde-2,2′-bipyridines 4 yielded N,N′-bis(2,2′-bipyridine-6-ylmethyl)-2,2′-biphenyl-enediamines 7, which were employed as hexadendate ligands with N6 donor sets in the synthesis of dicationic [Fe2+(7-κ6N)] complexes 8. Dependent on the substitution pattern the respective complexes are found in the HS state (8b and 8c) or show SCO behaviour
2,2'-二氨基联苯 5 与 6'-和 5'-取代的 6-甲醛-2,2'-联吡啶 4 的缩合和随后的还原得到 N,N'-双(2,2'-联吡啶-6-基甲基) )-2,2'-联苯二胺 7,在双阳离子 [Fe2+(7-κ6N)] 配合物的合成中用作 N6 供体组的六联配体 8。根据取代模式,在HS 状态(8b 和 8c)或显示 SCO 行为。通过依赖于温度的磁化率测量,使用埃文斯方法,已经确定了 SCO 的热力学参数 ΔH、ΔS 和 T1/2。T1/2 和 ΔH 非常容易被联苯桥中央 C-C 键附近的取代。