Iron and Silver Complexes of 4-(Imidazol-1-yl)-2,6-di(pyrazol-1-yl)-pyridine ( L ), Including a [Fe 3 (µ-F) 2 F 6 L 8 ] + Assembly
Iron and Silver Complexes of 4-(Imidazol-1-yl)-2,6-di(pyrazol-1-yl)-pyridine ( L ), Including a [Fe 3 (µ-F) 2 F 6 L 8 ] + Assembly
复制标题
4-(咪唑-1-基)-2,6-二(吡唑-1-基)-吡啶 ( L ) 的铁和银配合物，包括 [Fe 3 (µ-F) 2 F 6 L 8 ] 组件
DOI：
10.1002/ejic.202000782
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发表时间：
2020
影响因子：
2.3
通讯作者：
Capel Berdiell I
中科院分区：
文献类型：
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作者：
Capel Berdiell I
用咪唑酸钠处理2,4,6 -三氟吡啶，然后用2等量吡唑酸钠，在两个反应步骤中得到标题配体，总收率为40%。晶体[FeL2][BF4]2和[FeL2][ClO4]2是等结构的高自旋配合物，具有高度扭曲的六坐标几何形状和垂坠的咪唑基。相反，[Ag（µ‐L）]BF4·0.5MeCN是一种由κ1:κ3，µ‐配体连接的扭曲方形平面银离子的线性配位聚合物。用Fe[BF4]2·6H2O、Na3[FeF6]和lin适当比例反应制备了[feii3（µ‐F）2F6L8]BF4，并对部分[FeL2][BF4]2样品进行了污染。线性的[{trans‐FeFL4}2（µ‐F）2FeF4]+组装由单齿配体支持，通过咪唑基供体协调，并将C-H····F相互作用提供给中心的[FeF6]3 -片段。该星团在其铁（III）中心之间表现出适度的反铁磁耦合。
Treatment of 2,4,6‐trifluoropyridine with sodium imidazolate, then 2 equiv. sodium pyrazolate, in two reaction steps yields the title ligandLin 40 % overall yield. Crystalline [FeL2][BF4]2and [FeL2][ClO4]2are isostructural high‐spin complexes, with highly twisted six‐coordinate geometries and pendant imidazolyl groups. Conversely, [Ag(µ‐L)]BF4·0.5MeCN is a linear coordination polymer of distorted square planar silver ions linked by κ1:κ3,µ‐Lligands. Some samples of [FeL2][BF4]2were contaminated by [FeIII3(µ‐F)2F6L8]BF4, which was prepared in pure form following reaction of Fe[BF4]2·6H2O, Na3[FeF6] andLin appropriate ratios. The linear [{trans‐FeFL4}2(µ‐F)2FeF4]+assembly is supported by monodentateLligands coordinated through their imidazolyl donors, and donating C–H····F interactions to the central [FeF6]3–moiety. The cluster exhibits moderate antiferromagnetic coupling between its iron(III) centres.