halogenation

简明释义

英[ˌhælədʒəˈneɪʃən]美[hælədʒəˈneɪʃən]

n. 卤化，加卤作用

英英释义

单词用法

同义词

反义词

例句

1.Introduction of 11-hydroxy group into steroids by chemical methods, such as keto-reduction, halogenation-dehalogenation, borane-hydrogen peroxide and peroxidation-reduction are reviewed.

综述了在甾体化合物11 -位引入羟基的各种化学合成方法，主要包括酮基还原法、上脱卤素法、硼烷双氧水法、过氧化-还原法等。

2.This review deals with the recent application of strongly basic anion exchange resins as polymer supported reagents in oxidation, reduction, halogenation and nucleophilics substitutions, etc.

本文综述了近十年来强碱阴离子交换树脂支载的高分子试剂在氧化，还原，卤化和亲核取代反应中的应用。

3.This review deals with the recent application of strongly basic anion exchange resins as polymer supported reagents in oxidation, reduction, halogenation and nucleophilics substitutions, etc.

本文综述了近十年来强碱阴离子交换树脂支载的高分子试剂在氧化，还原，卤化和亲核取代反应中的应用。

4.With 2-cyano-4-nitro-aniline as raw material, 2-cyano-4-nitro-6-halogen- anilines have been prepared by direct halogenation.

以2-氰基-4-硝基苯胺为原料，用直接卤化法研制成2-氰基-4-硝基-6-氯苯胺、2-氰基-4-硝基-6-溴苯胺、和2-氰基-4-硝基-6-碘苯胺。

5.The five quinazoline compounds were prepared by using 2 amino 4,5 dimethoxy benzoic acid as original material, which underwent ring closing, halogenation and substitution.

方法：以2氨基4 ，5二甲氧基苯甲酸为原料，分别经过环化、氯代、取代等反应，合成了五种目标化合物。

6.For 1,10-Phenanthroline, any direct and selective halogenation way has not been explored.

目前，1，10-菲咯啉还没有直接有效的卤化方法。

7.In this thesis, the halogenation of Copper phthalocyanine and the method of preparation and the reaction mechanism of lower chlorinated Copper phthalocyanine were discussed.

本文较系统地论述了铜酞菁的卤代反应，制备不同卤代铜酞菁的方法，铜酞菁的低氯代的反应历程；

8.Addition Reactions to alkynes, Hydrogenation, Halogenation and HX. Hydration of alkynes. Tautomerization.

炔烃的加成，氢化，卤化和HX。炔烃的水化作用。

9.Methods By the reactions of nitration, acylation, halogenation, condensation, a new 5-aminosalicylic acid derivative was synthesized from salicylic acid and acetaminophen.

方法以水杨酸为起始原料，通过硝化、酰化、卤化反应，与对乙酰氨基酚相偶联，合成了新的5 -氨基水杨酸衍生物。

10.A typical example is the halogenation of a hydrocarbon.

典型的例子是碳氢化合物的卤化。

11.In the lab, we performed halogenation on benzene to create various halogenated aromatic compounds.

在实验室中，我们对苯进行了卤素化以创建各种卤代芳香化合物。

12.The process of halogenation is commonly used in organic chemistry to introduce halogen atoms into hydrocarbons.

在有机化学中，卤素化过程通常用于将卤素原子引入烃类。

13.During the halogenation of alkanes, free radicals are generated that can lead to multiple products.

在烷烃的卤素化过程中，会生成自由基，这可能导致多种产物。

14.The halogenation reaction can be initiated by heat or light, making it a versatile method for synthesis.

通过热或光可以启动卤素化反应，使其成为一种多用途的合成方法。

15.The halogenation of alkenes typically occurs via an electrophilic addition mechanism.

烯烃的卤素化通常通过亲电加成机制进行。

作文

Halogenation is a significant chemical reaction that involves the introduction of halogen atoms into organic compounds. This process plays a crucial role in the synthesis of various chemical products, including pharmaceuticals, agrochemicals, and polymers. The term 'halogenation' refers to the substitution of hydrogen atoms in an organic molecule with halogen atoms, such as fluorine, chlorine, bromine, or iodine. This transformation can greatly alter the physical and chemical properties of the original compound, making it more reactive or enhancing its stability. For example, when methane undergoes halogenation (卤素化反应), it can form halomethanes, which are valuable intermediates in organic synthesis.The mechanism of halogenation (卤素化反应) typically involves radical reactions, especially when dealing with alkanes. The process generally starts with the generation of halogen radicals through the homolytic cleavage of a halogen molecule, often initiated by heat or light. Once the radicals are formed, they can abstract hydrogen atoms from the alkane, resulting in the formation of a new radical that can further react with another halogen molecule to produce the halogenated product.One of the most common examples of halogenation (卤素化反应) is the chlorination of alkanes. In this reaction, chlorine gas is used to replace hydrogen atoms in the alkane chain, leading to the production of chloroalkanes. This reaction is particularly useful in the production of solvents and other industrial chemicals. However, it is essential to control the reaction conditions, as multiple substitutions can occur, leading to a mixture of products.In addition to alkanes, halogenation (卤素化反应) can also be applied to alkenes and alkynes. The addition of halogens to these unsaturated hydrocarbons typically occurs through electrophilic addition mechanisms, resulting in vicinal dihalides. These reactions are valuable in organic synthesis for constructing complex molecules and introducing functional groups that can be further manipulated.The importance of halogenation (卤素化反应) extends beyond synthetic chemistry; it also has implications in environmental chemistry. For instance, the halogenation (卤素化反应) of organic pollutants can lead to the formation of toxic byproducts that pose risks to human health and ecosystems. Understanding the mechanisms and outcomes of halogenation (卤素化反应) reactions is crucial for developing strategies to mitigate these environmental impacts.In summary, halogenation (卤素化反应) is a fundamental reaction in organic chemistry that introduces halogen atoms into organic molecules, significantly altering their properties and reactivity. Its applications range from industrial production to environmental considerations, highlighting its versatility and importance in both synthetic and applied chemistry. As research continues to evolve, understanding halogenation (卤素化反应) will remain vital for chemists aiming to design new compounds and address environmental challenges.

卤素化反应是一个重要的化学反应，涉及到卤素原子引入有机化合物中。这个过程在合成各种化学产品中发挥着至关重要的作用，包括药物、农用化学品和聚合物。术语“卤素化”指的是在有机分子中用卤素原子替代氢原子，这种转化可以极大地改变原始化合物的物理和化学性质，使其更具反应性或增强其稳定性。例如，当甲烷经历卤素化反应时，它可以形成卤代甲烷，这些都是有机合成中的有价值中间体。卤素化反应的机制通常涉及自由基反应，尤其是在处理烷烃时。该过程通常以卤素分子的均裂生成卤素自由基开始，通常通过热或光来引发。一旦生成了自由基，它们就可以从烷烃中抽取氢原子，从而形成一个新的自由基，该自由基可以进一步与另一个卤素分子反应，生成卤代产物。卤素化反应最常见的例子之一是烷烃的氯化反应。在此反应中，氯气用于替换烷烃链中的氢原子，产生氯代烷烃。这一反应在溶剂和其他工业化学品的生产中尤其有用。然而，控制反应条件是至关重要的，因为可能发生多次取代，导致混合产物的生成。除了烷烃外，卤素化反应还可以应用于烯烃和炔烃。这些不饱和烃的卤素添加通常通过亲电加成机制进行，导致邻位二卤化物的形成。这些反应在有机合成中非常有价值，能够构建复杂的分子并引入可以进一步操作的功能团。卤素化反应的重要性不仅限于合成化学；它在环境化学中也有影响。例如，有机污染物的卤素化反应可能导致有毒副产物的形成，这些副产物对人类健康和生态系统构成风险。理解卤素化反应的机制和结果对于开发减轻这些环境影响的策略至关重要。总之，卤素化反应是有机化学中的一个基本反应，它将卤素原子引入有机分子中，显著改变其性质和反应性。它的应用范围从工业生产到环境考虑，突显了其在合成和应用化学中的多功能性和重要性。随着研究的不断发展，理解卤素化反应将继续对旨在设计新化合物和应对环境挑战的化学家们至关重要。