查询词典 aromatic

This indicates that the IE of these aza-aromatic bicyclic molecules increases with the number of the N atoms. This finding may be attributed to the nature and the N atoms in the five-membered ring.

表示因为氮原子具有较大拉电子的能力，因此五角环上具有较多的氮原子会使得分子具有较高的游离能。

A series of sulfonated poly copolymers with different degree of sulfonation were synthesized by aromatic nucleophilic polycondensation of 3,3′-disulfonate 4,4′-dichlorodiphenylsulfone,4,4′-dichlorodiphenylsulfone and 4,4′-biphenol.

将磺化二氯二苯砜、二氯二苯砜与4，4′-联苯酚通过亲核缩聚反应得到一系列具有不同磺化度的磺化聚芳醚砜共聚物。

Four kinds of aromatic ether-linked dinitriles with low melting temperatures were obtained via the nucleophilic substitution of hydroquinone, resorcinol, biphenol and bisphenol A with CBN. They were polymerized to afford a series of poly(pheny-s-triazine)s under the optimized conditions.

以对苯二酚、间苯二酚和联苯二酚为原料，分别与对氯苯腈进行亲核取代反应，合成了三种较低熔点的含醚键二腈，并分别研究了其在优化条件下的聚合反应。

Any of various aromatic southwest Asian or Mediterranean plants of the genus Ruta, especially the ornamental R. graveolens, having bipinnately compound leaves that yield an acrid, volatile oil formerly used in medicine.

芸香：一种生长于亚洲西南部或地中海沿岸的芸香属植物，尤指装饰用的臭芸香，具有羽状复叶，能生产一种旧时作药用的刺激性的挥发油

Chapter 2 presents our studies on aromatic amide-derived phosphine applied to room temperature Suzuki cross-coupling of unactivated aryl chlorides with aryl boronic acids.

第二章主要研究了芳基酰胺衍生的膦配体在不活泼的氯代芳烃同芳基硼酸在室温下的Suzuki偶联反应中的应用。

Novel sodium 2-2-(alkylaryloxy-alkylamidoethanesulfonates (m+nAr-T, m, n: carbon numbers; Ar: aromatic nucleus; T: taurine) with high purity were synthesized through bromization, esterification, Fries rearrangement, Pd-catalyzed hydrogenation, Williamson reaction, and acylation, et al, using carboxylic acid, phenol and taurine as starting materials. The structures and purities were characterized.

以羧酸、苯酚和牛磺酸为原料，通过溴代反应、酯化反应、Fries重排反应、催化氢化反应、Williamson反应以及催化酰胺化反应等过程，首次成功合成并表征了系列结构明确的高纯度N-酰基牛磺酸钠(m+nAr-T，m、n为烷基链碳数，Ar为芳环，T表示taurine)。

The para-selectivities of mononitration in aromatic compounds such as ethylbenzene, bromobenzene and iodobenzene increased by 18%, 15% and 16% respectively.

反应具有强对位选择硝化能力，乙苯、溴苯和碘苯的对位硝化比例分别提高18%、15%和16%。

The second part is about that five-membered rings compounds were synthesised using aromatic aldehyde,α-bromoketone and imine ester in the present of zinc power.

2以芳香醛，α-溴代苯乙酮与氨基酸酯亚胺类化合物在金属锌粉的作用下，生成一系列的四氢吡咯化合物。

Common perennial aromatic herb native to Eurasia having buttonlike yellow flower heads and bitter-tasting pinnate leaves sometimes used medicinally.

原产欧亚的常见多年生芳香草本植物，纽扣状黄色花冠和苦味羽叶，可以入药。

Bushy aromatic European perennial herb having clusters of buttonlike white-rayed flower heads; valued traditionally for medicinal uses; sometimes placed in genus Chrysanthemum .

似灌木的欧洲芳香草本植物，有白色纽扣般花串；传统作医用；有时归为菊类。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。