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：

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:


  • Substituent - Wikipedia
    In organic chemistry, a substituent is one or a group of atoms that replaces (one or more) atoms, thereby becoming a moiety in the resultant (new) molecule [1][note 1]
  • What Are Substituents in Organic Chemistry? - Chemistry Steps
    Substituents (methyl, ethyl) in organic chemistry are atoms or groups of atoms that replace a hydrogen atom on the parent chain of a molecule
  • SUBSTITUENT Definition Meaning | Dictionary. com
    SUBSTITUENT definition: an atom or atomic group that takes the place of another atom or group present in the molecule of the original compound See examples of substituent used in a sentence
  • What is a substituent in organic chemistry? - California Learning . . .
    In organic chemistry, a substituent represents an atom or a group of atoms that replaces one or more hydrogen atoms on a parent molecule Substituents are fundamental to understanding and manipulating the physical, chemical, and biological properties of organic compounds
  • SUBSTITUENT Definition Meaning - Merriam-Webster
    The meaning of SUBSTITUENT is an atom or group that replaces another atom or group in a molecule
  • 1. 3: Alkyl Substituents - Chemistry LibreTexts
    An alkane can be appended onto an existing chain to create a branched molecule This branched piece of the molecule is called a substituent A substituent made from an alkane is called an alkyl group Alkyl groups are named similarly to unbranched alkane chains Alkyl groups can also be branched
  • Naming Complex Substituents — Organic Chemistry Tutor
    In this tutorial, I want to talk about the nomenclature of the complex substituents In the last tutorial of this series, we discussed the fundamentals of the nomenclature and how it works And now, we are going to add one more layer to it and learn how to name molecules that have complicated branches for substituents
  • Naming Complex Substituents - Chemistry Steps
    We have learned that to name a molecule, we need to find the parent chain and the smaller carbon fragments known as alkyl groups or substituents, in general For example, removing one hydrogen from the corresponding hydrocarbon, we get the methyl, ethyl, and propyl substituents
  • What Is a Substituent in Organic Chemistry? A Complete Guide for . . .
    Discover what a substituent is in organic chemistry, its types, importance, and how it affects molecular properties Learn with examples and practical insights!
  • 16. 5: An Explanation of Substituent Effects - Chemistry LibreTexts
    Substituted rings are divided into two groups based on the type of the substituent that the ring carries: Activated rings: the substituents on the ring are groups that donate electrons Deactivated rings: the substituents on the ring are groups that withdraw electrons





中文字典-英文字典  2005-2009