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首页> 外文期刊>Bulletin of the Chemical Society of Japan >Intermolecular Hydrogen Bonds between a Radicaland a Diamagnetic Matrix: CW-ESR Investigationsof 2,6-Di-tert-butyl-4-hydroxymethylphenol
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Intermolecular Hydrogen Bonds between a Radicaland a Diamagnetic Matrix: CW-ESR Investigationsof 2,6-Di-tert-butyl-4-hydroxymethylphenol

机译：自由基和反磁性基质之间的分子间氢键：2,6-二叔丁基-4-羟甲基苯酚的CW-ESR研究

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摘要

We propose a novel formation model of an intermolecular hydrogen bond between radicals and a diamagneticmatrix in the condensed phase. W-band and multi-frequency ESR studies revealed that the polycrystalline radical samplegenerated from PbO_2 oxidation of 2,6-di-tert-butyl-4-hydroxymethylphenol in toluene solution in vacuum at roomtemperature has an anomalously large 'H-hyperfine interaction. It was concluded that this interaction is attributed tohydrogen bonding between the O· which is a paramagnetic center in the molecular structure of the radicals and the para-OH or the phenolic OH of the primary phenol. Although the phenol shows interesting radical chemical reactions unlikeother 2,6-di-tert-butylphenol derivatives, the generated radical species were successfully defined by the solution ESRinvestigations. This may be the first ESR observation of an anomalously large hyperfine doublet structure coming from aproton on an intermolecular hydrogen bond between a radical and a diamagnetic phenol.
机译：我们提出了一个新的自由基和反磁性矩阵在凝聚相之间的分子间氢键形成模型。 W波段和多频ESR研究表明，室温下甲苯溶液中2,6-二叔丁基-4-羟甲基苯酚的PbO_2氧化生成的多晶样品具有异常大的'H-超细相互作用。结论是，这种相互作用归因于在自由基分子结构中为顺磁性中心的O·与伯酚的对羟基或酚羟基之间的氢键。尽管苯酚显示出与其他2，6-二叔丁基苯酚衍生物不同的有趣的自由基化学反应，但通过溶液ESR研究成功地确定了所产生的自由基种类。这可能是首次ESR观察到，自由基和抗磁性酚之间的分子间氢键上的质子产生异常大的超细双峰结构。

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