查询词典 aromatic compounds

By defining several localindices which can be easily calculated from these ground-state wavefunctions, we first succeeded in explaining bond lengths, orientation ofelectrophilic aromatic substitution, and local aromaticity of these benzenoidhydrocarbons within the VB theory. Moreover, the energy splittings betweenthe ground state and first excited state are applied to correlate with theiroverall aromatic characters, the results are also in good agreement withrelated predictions from MO theory.

通过定义一些可由基态波函数直接计算的局域指标，首次在VB模型下成功地解释了苯型烃的键长、亲电取代反应的方向及局域芳香性，并用基态与第一激发态的能量差讨论了这些分子的整体芳香性，得到了与分子轨道理论的预测基本平行的结果。

Humic acid in soil plays an important role in transfer of hydrophobic organic compounds such as polycyclic aromatic hydrocarbons.

土壤腐殖酸的吸附作用对多环芳烃等疏水性有机污染物的迁移产生影响。

The aromatic aldehyde compounds are a kind of fine chemicals and have the very broad market prospect.

芳香族醛类化合物是非常重要的一类精细化学品，具有很广阔的市场前景。

The result indicates that those four resuscitation-inducing aromatic herbs mainly contain volatile oil ,and all contain alicyclic compounds; the volatile oil of Borneolum Syntheticum and Styrax both contain Sesquiterpenes of caryophyllene; as resin herbs , Styrax and Benzoinum both contain vanillin, resin ester and balsamic acid .

结果表明，四味芳香开窍药主含挥发油，均含有脂环化合物，并存在一些共有成分，如龙脑冰片与苏合香挥发油中均含有倍半萜类成分石竹烯；苏合香和安息香皆为树脂类中药，两者均含有香荚兰醛成分，尚含树脂酯，香脂酸等。

The average relativeerror was 3.63%, less much than mostly used group-contribution methods for alkyne, chlorine derivative, iodine derivative, especially for alkane, bromine derivative, aromatic hydrocarbon, alicyclic hydrocarbon and sulfur-containing organic compounds.

对4068种有机物的正常沸点进行了估算，其平均相对误差为3.63%，总体估算精度明显优于相比较的基团贡献法，对炔烃、氯衍生物、碘衍生物，尤其是对烷烃类、溴衍生物、芳烃、脂环烃和含硫化合物的估算误差明显减小。

Isoprene and toluene and its homologs are focused to illustrate the photooxidation of alkene and aromatic compounds.

最后，对二次有机气溶胶形成机制研究的发展方向进行了展望。

Ce2(SO4)3 was used as an inexpensive and effective catalyst for the Friedel-Crafts alkylation of aromatic compounds with benzyl alcohol s, allyl alcohols and benzyl chlorides.

硫酸亚铈作为一种便宜的和有效的催化剂催化芳香化合物与苄基醇、烯丙醇类化合物和苄基氯的傅-克烷基化反应。

Ce2(SO4)3 was used as an inexpensive and effective catalyst for the Friedel-Crafts alkylation of aromatic compounds with benzyl alcohols, allyl alcohol s and benzyl chlorides.

硫酸亚铈作为一种便宜的和有效的催化剂催化芳香化合物与苄基醇、烯丙醇类化合物和苄基氯的傅-克烷基化反应。

After the bacteria can be induced degradation of more and more aromatic hydrocarbon compounds.

经过诱导的细菌能降解更的多的芳香烃化合物。

" Benzene (1825) Simplest aromatic hydrocarbon, parent substance of a large class of chemical compounds."

苯(1825)：最简单的芳香烃，是一大类化合物的母体。

Aquatic or marsh-growing fern allies; known to have existed since the Cenozoic; sometimes included in Lycopodiales.

生活于水中或湿地的蕨类；从新生代生存至今；有时归于石松目之中。

The engine was uprated from a 90hp Franklin to a 125hp Lycoming.

改良过的引擎是从90hp到125hp莱康明富兰克林。