1咪唑在酸性溶液中哪一个氮原子被质子化? 2.如何理解a-8甲基吡啶的甲基的酸性较-甲基吡啶的甲基强这一事实

第十二章有机含氮化合物 12-1将下列化合物按沸点高低排列顺序 COOH(2)CH,CN(3)CH,CHO(4)CH,CH,OH 12-2用IR谱鉴别下列化合物 12-3分离下列混合物

1.找出下列化合物中的手性碳原子,并计算在理论上应有多少个对映异构体

I Classification of Rearrangement Reactions() II Nucleophilic rearrangement() 1 Wagner-Meerwein rearrangement( 2 Pinacolic Rearrangement 3 a-ethandione Rearrangement 4 Beckmann Rearrangement 5 Baeyer-Villiger Rearrangement

第九章羧酸及其衍生物 第一节羧酸 一、结构与命名 1.结构:含官能团(COOH)的化合物为羧酸

12.1 Introduction Systems that have a p orbital on an atom adjacent to a double bond---molecules with delocalized pi￾bonds– are called conjugated unsaturated systems

15.1 Electrophilic aromatic substitution reactions These reactions are of the general type shown below;

Except for formaldehyde, the simplest aldehyde, all aldehydes have a carbonyl group, C=O, bonded on one side to a carbon, and on the other side to a hydrogen. In ketones, the carbonyl group is situated between two carbon atoms

17.1 The acidity of the α-hydrogens ofcarbonyl compounds: Enolate ions

Compounds having two carbonyl groups separated by an intervening carbon are called β-dicarbonyl compunds, and these compounds are highly versatile reagents for organic synthesis