英文字典中文字典


英文字典中文字典51ZiDian.com



中文字典辞典   英文字典 a   b   c   d   e   f   g   h   i   j   k   l   m   n   o   p   q   r   s   t   u   v   w   x   y   z       







请输入英文单字，中文词皆可：


请选择你想看的字典辞典：
单词字典翻译
heleb查看　heleb　在百度字典中的解释百度英翻中〔查看〕
heleb查看　heleb　在Google字典中的解释Google英翻中〔查看〕
heleb查看　heleb　在Yahoo字典中的解释Yahoo英翻中〔查看〕

安装中文字典英文字典查询工具!


中文字典英文字典工具:
选择颜色:
输入中英文单字

































































英文字典中文字典相关资料:


  • Aromatic compound - Wikipedia
    Aromatic compounds or arenes are organic compounds "with a chemistry typified by benzene" and "cyclically conjugated " [ 1 ] The word "aromatic" originates from the past grouping of molecules based on odor, before their general chemical properties were understood
  • 8. 12: Aromatic Compounds: Structure Nomenclature
    Today, an aromatic compound is any compound that contains a benzene ring or has certain benzene-like properties (but not necessarily a strong aroma) You can recognize the aromatic compounds in this text by the presence of one or more benzene rings in their structure
  • Aromatic compound | Aromatic hydrocarbons, Benzene, Cyclic . . .
    aromatic compound, any of a large class of unsaturated chemical compounds characterized by one or more planar rings of atoms joined by covalent bonds of two different kinds The unique stability of these compounds is referred to as aromaticity
  • What are Aromatic Compounds? - BYJUS
    What are Aromatic Compounds? Aromatic compounds are chemical compounds that consist of conjugated planar ring systems accompanied by delocalized pi-electron clouds in place of individual alternating double and single bonds They are also called aromatics or arenes The best examples are toluene and benzene
  • Aromatic, Antiaromatic, or Nonaromatic Compounds - Chemistry . . .
    Below are some examples to practice determining compounds as aromatic, nonaromatic, or antiaromatic 1 Identify the following molecules as Aromatic, Antiaromatic, or Nonaromatic Consider the lone pairs of electrons The six-membered ring is aromatic as it consists of 6 π electrons in a fully conjugated p orbital system
  • Aromatic Compounds - ChemTalk
    In this tutorial, you will learn what makes a compound aromatic, the power of aromaticity, common examples of aromaticity, anti-aromatic compounds, and important aromatic ring reactions Aromatic: Cyclic, planar structures that have a continuous conjugated system and satisfy Hückel’s law
  • Aromatic Compounds: What Makes Them Special?
    Aromatic compounds, or arenes, are a cornerstone of organic chemistry They’re the molecules that underpin dyes, fuels, medicines, plastics, and even the DNA in your cells





中文字典-英文字典  2005-2009