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首页> 外文期刊>Acta crystallographica. Section C, Structural chemistry. >A new synthetic route to the electron-deficient ligand tris(3,4,5-tribromopyrazol-1 -yl)phosphine oxide
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A new synthetic route to the electron-deficient ligand tris(3,4,5-tribromopyrazol-1 -yl)phosphine oxide

机译:电子缺陷配体Tris(3,4,5-三溴吡唑-1-基)膦氧化膦的新合成途径

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摘要

The anionic tris(pyrazolyl)borates, or scorpionates, have proven to be extremely useful ligands. Neutral tris(pyrazolyl)methane ligands, however, are difficult to prepare and require numerous purification steps for a number of substitution patterns. We have previously outlined two different routes for accessing neutral tris(pyrazolyl) ligands. We describe here an adaptation of the previously published procedures for the synthesis of the electron-poor ligand tris(3,4,5-tribromopyrazol-1-yl)phosphine oxide, C_9Br_9N_6OP. Similar electron-deficient ligands have been proven to unlock unique chemistry for the anionic scorpionates. The title perbrominated tris(pyrazolyl)phosphine oxide displays a network of halogen bonds in the solid state. All the bonds in the pyrazole ring are rather similar to the reported borate analogues, which makes this molecule promising as a ligand for applications where very electron-poor metal complexes are required.
机译:恶性三(吡唑基)硼酸盐或蝎子已被证明是极其有用的配体。 然而,中性Tris(吡唑基)甲烷配体难以制备并且需要许多替代图案的纯化步骤。 我们之前已经概述了两种不同的路线,用于进入中性Tris(吡唑基)配体。 我们在此描述了先前公布的用于合成电子较差的配体三(3,4,5-三溴吡唑-1-基)膦氧化物,C_9BR_9N_6OP的程序的适应。 已证明类似的电子缺陷配体以解锁独特的阴离子蝎子的化学。 标题置化的Tris(吡唑基)膦氧化膦显示在固态中的卤素键网络。 吡唑环中的所有键相当于报告的硼酸硼类似物,这使得该分子使得作为需要非常电子差的金属配合物的应用的配体。

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