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首页> 外文期刊>Zeitschrift fur Anorganische und Allgemeine Chemie >Synthesis and magnetic properties of new octahedral iron(II) complexes
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Synthesis and magnetic properties of new octahedral iron(II) complexes

机译:新型八面体铁(II)配合物的合成和磁性

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The reaction of iron(II) acetate with the tetradentate Schiff base like ligands H(2)Ll ((E,E)-[{diethyl 2,2'-[1,2-phenylene-bis-(iminomethylidyne)]bis[3-oxobutanato]}]) and H2L2 ([([3,3']-[1,2-phenylenebis(iminomethylidyne)]bis(2,4-pentatne-dionato)(2-)- N,N',O2,O2']) in the presence of 1-meim (1-methylimidazole) or 2-meim (2-methylimidazole) leads to the formation of pentacoordinated or octahedral complexes depending on the used reaction conditions. Two pentacoordinated and four octahedral iron(II) complexes of the composition [FeL1(1-meim)(2)] (1), [FeL2(1-meim)] (2), [FeL2(1-meim)(2)] (3), [FeL2(1-meim)(2)](DMF) (3(DMF)), [FeL1(2-meim)](MeOH)(0.5) (4) and [FeL1(2-meim)(2)] (5) were isolated and structurally characterized. For the 2-meim complexes a hydrogen bond network between the imidazole N-H hydrogen and the carbonyl oxygen of the equatorial ligand is formed, while for the 1-meim derivatives only weak van der Waals interactions are observed. Magnetic measurements were performed on all samples. As expected, the pentacoordinated complexes remain in the high-spin state in the whole temperature range investigated. For the octahedral complexes, I and 5 are pure high-spin complexes while for 3 and 3(DMF) spin transition behaviour is observed.
机译:乙酸铁(II)与四齿席夫碱类似的配体H(2)L1(((E,E)-[{diethyl 2,2'-[1,2-phenylene-bis-(iminomethylidyne)] bis [ 3-oxobutanato]}]))和H2L2([[[[3,3']-[1,2-亚苯基双(亚氨基亚甲基二炔)] bis(2,4-戊二酮)(2-)-N,N',O2 ,O2'])在1-meim(1-甲基咪唑)或2-meim(2-甲基咪唑)的存在下,根据所使用的反应条件,会形成五配位或八面体的络合物,其中二配位是四配位,四配位是八面体)[FeL1(1-meim)(2)](1),[FeL2(1-meim)](2),[FeL2(1-meim)(2)](3),[FeL2( 1-meim)(2)](DMF)(3(DMF)),[FeL1(2-meim)](MeOH)(0.5)(4)和[FeL1(2-meim)(2)](5)对于2-meim配合物,在咪唑NH氢和赤道配体的羰基氧之间形成了氢键网络,而对于1-meim衍生物仅观察到了弱的范德华相互作用。被执行在所有样品上。正如预期的那样,五配位配合物在整个研究温度范围内均保持高自旋状态。对于八面体配合物,I和5是纯的高自旋配合物,而对于3和3(DMF)则观察到自旋转变行为。

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