卤原子在它们的介电子层含有七个电子。
Halogen atoms contain seven electrons in their valence shell.
卤原子在它们的价电子层含有七个电子，因此是一价的。
Halogen atoms contain seven electrons in their valence shell, and, consequently, are monovalent.
卤原子作为保护基，代替末端炔发生碳-氢官能团化反应。
Halogen atom could activate the triple bond and as the directing group, the triple bond occurs the electrophilic addition reaction.
卤原子作为炔烃三键活化基团和定位基，炔烃三键发生亲电加成反应；
This type of reaction has signicant advantages, the alkyne proceeds the coupling reaction with the halogen atom as the leaving group.
加成物（ 1 ）与卤素反应后，与锡原子相连的苯基被取代，得到一卤代、二卤代和混合二卤代物（2—8） 。
The phenyl groups in compound 1 were substituted by ICl, Br 2 or I 2 to yield mono- and dihalide derivatives(2—8).
观测了五种典型的电子束泵浦高压混合气体产生的卤惰三原子准分子荧光发射谱。
The fluorescence emission spectra of five typical triatomic rare gas halide excimers have been observed from electron-beam-excited high-pressure mixtures.
结果表明：单一卤代酚的生物毒性随着卤素原子数目在化合物中的增多呈增强趋势；
The results indicated that the single toxicity of the six halophenols enhanced with the increasing of the halogenoid atoms;
有机卤代物的光反应作为构建碳-碳键和碳-杂原子键的一种重要途径已经得到了广泛和深入的研究。
As an important approach of carbon-carbon bond formation and carbon-heteroatom bond formation, photochemistry of organic halides has been studied extensively.
有机卤代物的光反应作为构建碳-碳键和碳-杂原子键的一种重要途径已经得到了广泛和深入的研究。
As an important approach of carbon-carbon bond formation and carbon-heteroatom bond formation, photochemistry of organic halides has been studied extensively.
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