The destruction of aromatic ring occurred during heating stage.
环的破坏主要发生在升温阶段。
The effect of the substituents on the aromatic ring upon the hydrogen rearrangement was studied.
分析了芳环上取代基对氢重排的影响。
In- termolecular reactions were observed with the C—Pd bond formed by the C—H activation of the aromatic ring and the nitrile group.
当然，人们也观察到了通过芳香C—H键活化产生的芳基碳钯键与腈基的分子间反应。
Other reactions such as aromatization of naphthenes systems and eventual condensation of the aromatic ring systems will produce coke.
其它诸如环烷系的芳构化与芳环系的最终缩聚等反应将导致焦炭的生成。
Abnormal hydrogenation of an aromatic ring of hainanensine analogue is reported. The possible mechanism for this reaction is provided.
报道了海南粗榧新碱类似物芳环的一种反常氢化反应，并提出了可能的反应机理。
The properties of the substituents on aromatic ring would influence whether the product distribution could be controlled conveniently.
芳环上取代基性质对产物分布的可调性具有重要的影响。
Fluorinated polymers of interest have aromatic groups in their repeat units and at least about 25 % of available aromatic ring positions fluorinated.
关注的氟化聚合物在它们的重复单元中具有芳基并且具有至少约25 %的有效的可被氟化的芳环位置。
From molecule structure of coal, coal reaction character was described by aromatic ring, hydrogenation aromatic ring, alkane, alkane bond, oxy-group.
从煤分子结构出发，煤的反应性可以用芳香环，氢化芳香环，烷烃链、烷烃键和含氧官能团的变化来描述。
The dependence of relative intensity and frequency of bands of aromatic ring on the atomic number of lanthanides indicates the presence of a double-double effect.
芳香环谱带的相对强度和频率对于镧系元素原子序数的依赖关系表明双-双效应的存在。
In particular, for polymers with the aromatic groups along the polymer backbone generally at least about 55 percent of the aromatic ring positions are fluorinated.
尤其，对于沿着聚合物主链带有芳基的聚合物通常有至少约55%的芳环位置被氟化。
The invention has the advantages of abundant raw material, low cost and high yield, and can directly obtain monobromo aromatic ring without separation and purification;
本发明的优点是：原料易得，成本低、收率高，无需分离纯化即可直接制得单溴芳环产物；
It is worth while to note that the steroidal glycoside possessing an aromatic ring substituted alkanoyl group at its glucose moiety was found for the first time in fungi .
值得注意的是， 这种糖片段上有芳环取代的烷酰氧基基团的麦角甾烷型甾体糖苷为真菌中首次报道。
The first is the direct extraction of the sulfur atom from the molecule, and the second is the hydrogenation of one aromatic ring followed by extraction of the sulfur atom.
前者为直接从分子中脱去硫原子，后者是一个芳香环先加氢，然后再脱去硫原子。
In the picoline pyrolysis experiment, the methyl disengages from aromatic ring to form methane firstly, then the following reaction of the aromatic ring is similar to pyridine.
甲基吡啶的热稳定性比吡啶差，热解时甲基首先脱离芳香环进入气相，随后芳香环的反应途径和吡啶类似；
Based on the infrared spectra, it is suggested that the scale insects waxy compounds are composed majorly by long-chain fatty alcohol and fatty acids and some compounds with aromatic ring.
此外，根据红外光谱特征分析，可以知道该虫蜡泌物的化学成分主要为长链脂肪酸、脂肪醇和一些带芳香环的化合物。
Based on the infrared spectra, it is suggested that the scale insects waxy compounds are composed majorly by long-chain fatty alcohol and fatty acids and some compounds with aromatic ring.
此外，根据红外光谱特征分析，可以知道该虫蜡泌物的化学成分主要为长链脂肪酸、脂肪醇和一些带芳香环的化合物。
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