一个人可以失败很多次，但是只要他没有开始责怪旁人，他还不是一个失败者

一、 分析化学的任务和作用 1、 分析化学：分析化学是研究测定物质组成的分析方法及其相关理论的科学

One complication associated with alkene hydration is the occurrence of arrangements

Acetylenic hydrogens can be deprotonated with relatively strong bases (sodium amide is typical)

Alkenes are hydrocarbons whose molecules contain the carbon-carbon double bond. Alkynes are hydrocarbons whose molecules contain the carbon-carbon triple bond

Infrared Spectroscopy: An Instrumental Method for detecting Functional Groups

Substitution reactions occur when two reactants exchange parts to give two new products. In a substitution, one replaces another

21.11 Aryl Halide and Nucleophilic Aromatic Substitution 21.12 Spectroscopic Analysis of Phenols and Aryl Halides

17.7 Lithium Enolates 17.8 α-Selenation: A Synthesis of α,β-Unsaturated Carbonyl Compounds 17.9 Additions to α,β-Unsaturated Aldehydes and Ketones

The aldols formed in aldol additions can be easily dehydrated to yield conjugated enals (enones)