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1)  Dioxin-like aromatic
二噁英类卤代芳烃
2)  dioxin-like aromatic halides
二口恶英类卤代芳烃
1.
In this paper,the properties,environmental behaviors,separation and analysis methods of some new types of dioxin-like aromatic halides are reviewed in detail.
作者对部分新型二口恶英类卤代芳烃化合物的性质、环境行为、分离分析方法等进行了详细评述。
3)  aryl halide
卤代芳烃
1.
Ligand free Ullmann coupling reactions of aryl halides catalyzed by Pd/C were studied in O/W Triton X10 microemulsion(ME) in comparison with biphase systems.
结果表明,微乳体系中联苯收率高于两相体系;比较了在离子、非离子表面活性剂构成的不同微乳体系中的反应活性;研究了卤代芳烃在TX10 ME(O/W)中的甲酸钠、碱类型、Pd/C用量、温度等对反应的影响。
2.
Recent advances in the palladium-catalyzed Ullmann-type coupling of aryl halides in- cluding reductive coupling and oxidative coupling reactions have been reviewed.
综述了钯催化卤代芳烃Ullmann偶合反应的研究进展,其中包括钯催化还原Ullmann偶合反应和钯催化氧化Ullmann偶合反应等两部分。
3.
The reductive coupling of aryl halides to form the corresponding biaryls was effected with high selectivity in water,using formic hydrazide as a reducing agent in the presence of a catalytic amount of Pd/C.
在Pd/C催化下,以甲酰肼为还原剂,卤代芳烃通过还原偶联反应能高选择性地合成相应的联苯化合物。
4)  aryl halides
卤代芳烃
1.
It is an important method to form C Ar—N by palladium-catalyzed amination of aryl halides.
钯催化卤代芳烃胺化是形成CAr—N的重要方法。
2.
With the application of sterically hindered, electron-rich alkylphosphines, this reaction is now applicable to a broad range of aryl halides.
我们发现,利用2-叔丁基膦-2-异丙氧基-1,1 -联萘作配体,在钯的催化下,丙二酸二乙酯、乙酰乙酸乙酯分别用K3PO4和K2CO3作为碱,和多种卤代芳烃发生α-芳基化反应,实现了α-芳基化反应。
3.
Firstly, a cyanation process of aryl halides with K4[Fe(CN)_6]-3H_2O as the cyanating reagent was studied.
本文先以价廉易得、环境友好、无毒的亚铁氰化钾作为氰基化试剂对卤代芳烃进行氰基化反应研究。
5)  aromatic halide
卤代芳烃
1.
Study of the trifluoromethylation of aromatic halides;
卤代芳烃三氟甲基化反应的研究
2.
In the presence of copper(Ⅰ) iodide as the catalyst and under the protection of inert gas,aromatic halides including bromobenzene,iodobenzene,iodotuluene and iodonitrobenzene reacted with sodium trifluoroacetate to give the corresponding trifluoromethylated compounds in moderate to good yields.
在惰性气体保护及碘化亚铜催化的条件下,三氟乙酸钠与溴苯、碘苯以及碘代甲苯和碘代硝基苯等卤代芳烃反应,制备得到相应的三氟甲基化合物。
6)  halogenated aromatic hydrocarbons
卤代芳烃
1.
Research on application of PLS and PM3 algorithms in QSPR to reductive dehalogenation of selected halogenated aromatic hydrocarbons in anoxic sediment;
PLS和PM3算法对缺氧沉积物中卤代芳烃还原脱卤QSPR研究
2.
Trie application of carboxymethyl-β-cyclodextrin on the solubi-lization of halogenated aromatic hydrocarbons is investigated.
本文报道了羧甲基-β-环糊精的一种简便合成方法,并研究了羧甲基-β-环糊精对卤代芳烃类化合物的增溶作用。
3.
PM3 hamiltonian was used to compute descriptors of some halogenated aromatic hydrocarbons, such as pola-rizability, dipole, etc.
采用量子化学PM3算法,计算了部分卤代芳烃的分子平均极化率(α)等参数,并成功地应用于部分卤代芳烃正辛醇/空气分配系数(K_∞)的拟合与预测。
补充资料:二噁英
分子式:
CAS号:

性质:(1)多氯二苯并二噁英类(polychlorinated dibenzo-p-dioxins;PCDD)的简称。又称二苯基二噁英(diphenylene dioxins)。中间环5、10两位置为氧原子,其余1~4,6~9各位置可被卤素原子或有机基团取代。被氯原子取代时,随氯原子数(1~8个)的多少,可形成8个同系物,75个异构体(同族体)。性质稳定,不易分解。其毒性与氯原子取代的位置密切相关,有4个氯原子的二噁英是有毒的(共22个),其中四氯二苯并二噁英(TCDD)毒性最强。二噁英的前驱物是氯联苯、氯苯、氯苯酚等含氯芳香烃化合物,在燃烧过程中形成二噁英。它在自然界能天然生成,人为来源主要是废弃物的焚烧排放物,如城市垃圾、工业废物、医院废物、防腐剂处理过的木材、有机制品、电容器和绝缘器中绝缘液、旧轮胎作能源等的焚烧;工业生产的排放源有造纸厂漂白废液、生产氯的石墨电极渣、催化剂高温氯化活化、钢铁冶炼和废金属回收等。在环境中的分布,地表土中含量最多,植物和河湖沉积物中其次,大气飞灰和地表水中较少。动物实验证实二噁英有致癌致畸作用,列为人类可疑致癌物,其毒性危害程度远超过有机氯农药和多氯联苯。(2)特指四氯二苯异二噁英。

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