首页> 外文期刊>Inorganica Chimica Acta >The coordination chemistry of unsymmetric N-capped tripodal NO _3 ligands with iron(III), oxo-vanadium(V) and dioxo-molybdenum(VI) metal centres
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The coordination chemistry of unsymmetric N-capped tripodal NO _3 ligands with iron(III), oxo-vanadium(V) and dioxo-molybdenum(VI) metal centres

机译:非对称氮封端的三脚架NO _3配体与铁(III),氧钒(V)和二氧钼(VI)金属中心的配位化学

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摘要

The synthesis and characterisation of iron(III) [Fe(L ~1)] _2 (1), oxo-vanadium(V) [VO(L ~1)] (2) and dioxo-molybdenum(VI) K[MoO _2(L ~1)] (3) complexes supported by a partially unsymmetric N-capped tripodal NO _3 ligand (L ~1) are reported. Complexes 1 and 2 were prepared by reactions of a proligand [H _3L ~1] and their corresponding metal precursor (FeCl _3 and VOCl _3, respectively) in the presence of triethylamine in THF, while 3 was obtained in a similar manner by treating [MoO _2(acac) _2] (acac = acetylacetonate) with the same proligand and potassium hydroxide in methanol. The X-ray crystal structure of 1 illustrates a dimeric structure with a bis-(μ-phenoxo) Fe _2O _2 diamond core, and each iron centre bears a rare NO _4 coordination sphere. The preparation of a previously unknown, fully unsymmetric N-capped tripodal NO _3 proligand [H _3L ~2] featuring three different phenolic arms is also described. Reaction of [H _3L ~2] with VOCl _3 yielded the oxo-vanadium(V) complex [VO(L ~2)] (4). Complexes 2-4 exist as monomers in solution and were characterised by NMR (~1H and ~(13)C), IR (for 3), mass spectrometry, and elemental analysis.
机译:铁(III)[Fe(L〜1)] _2(1),氧钒(V)[VO(L〜1)](2)和二氧钼(VI)K [MoO _2的合成与表征(L〜1)](3)报道了由部分不对称的N-封端的三脚架NO_3配体(L〜1)支撑的络合物。配合物1和2是由配体[H _3L〜1]与相应的金属前体(分别为FeCl _3和VOCl _3)在三乙胺在THF中反应制备的,而3则通过处理[ MoO _2(acac)_2](acac =乙酰丙酮化物),具有相同的配体和甲醇中的氢氧化钾。 1的X射线晶体结构说明了具有双(μ-phenoxo)Fe _2O _2金刚石核的二聚体结构,并且每个铁中心都带有稀有的NO _4配位球。还描述了一种先前未知的,具有三个不同酚基臂的,完全不对称的,不完全对称的N封端的三脚架NO _3配体[H _3L〜2]的制备。 [H _3L〜2]与VOCl _3反应生成羰基钒(V)络合物[VO(L〜2)](4)。配合物2-4以单体形式存在于溶液中,并通过NMR(〜1H和〜(13)C),IR(用于3),质谱和元素分析对其进行表征。

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