Synthesis and structural characterisation of the novel iron helicate [Fe2(µ-L)4(µ-Cl)2][FeCl4]2 and metalla-macrocycle [Fe2(µ-L)2(THF)4Cl2][FeCl4]2 {L = N,N′-di(n-butylcarbamoyl)pyridine-2,6-dicarboxamide}
作者:Hayley A. Burkill、Ramón Vilar、Andrew J. P. White、David J. Williams
DOI:10.1039/b200191h
日期:2002.3.8
The reactions of a new disubstituted pyridine with FeCl2 have been studied resulting in the formation of two novel structures: a quadruply-stranded iron helicate and a metalla-macrocycle.
receptors, containing either 2,6-substituted phenyl or 2,6-substituted pyridine, are prepared, and their anionbinding properties are investigated. Compared with the phenyl bisurea receptors, the pyridine bisurea receptors can be more easily converted to a cis–cis conformation from a trans–trans conformation, providing a cavity that more closely matches the volume of a fluoride ion and increasing the number
Synthesis, Structural Characterization, and Magnetic Studies of Polynuclear Iron Complexes with a New Disubstituted Pyridine Ligand
作者:Hayley A. Burkill、Neil Robertson、Ramón Vilar、Andrew J. P. White、David J. Williams
DOI:10.1021/ic048620e
日期:2005.5.1
crystal structures of 3 and 5 and magnetic studies for all the compounds are herein presented. Interestingly, the structural analysis of 5 at room temperature indicates that one of the iron centers is Fe(III) while the other two have an average valence state between Fe(II) and Fe(III). The five complexes herein presented demonstrate the great versatility that the new ligand has as a building block for
由氯化铁与2,5-二取代的吡啶H 2 L(n)(H 2 L 1)= N,N′-双(正丁基氨基甲酰基)吡啶-2,6-二甲酰胺反应制备了一系列新型的多铁物质。H 2 L 2 = N,N′-双(正乙基氨基甲酰基)吡啶-2,6-二甲苯甲酰胺)。通过对进行反应的实验条件进行小的修改,便可以制备四链二铁(II)络合物[Fe2(mu-H2L1)4(mu-Cl)2] [FeCl4] 2(1 ),金属环[Fe2(mu-H2L1)2(THF)4Cl2] [FeCl4] 2(2),六铁(III)化合物[Fe6(L1)2(mu-OMe)6(mu4-O)2Cl4] (3)和三价铁三价铁配合物[Fe3(L(n))3(mu3-O)](n = 1,4; n = 2,5)。本文介绍了3和5的X射线晶体结构以及所有化合物的磁性研究。有趣的是,室温下5的结构分析表明,其中一个铁中心是Fe(III),而另外两个铁中心的平均价态在