The phenyl group is often abbreviated as cche. ph- The name benzyl is an alternative name for the phenylmethyl group Phenyl Cl Chlorobenzene 苯基 CH2 Benzyl CH2CI Benzyl chloride 苄基 苄基氯
The phenyl group is often abbreviated as C6H5 -, Ph-. The name benzyl is an alternative name for the phenylmethyl group: CH2 - Phenyl Benzyl CH2Cl Benzyl chloride Cl Chlorobenzene 苄 基 氯 苯 基 苄 基
13. 3 Reactions of benzene Br2/CCI4 No addition of bromine Why? dark,25°C KMnO,/H,o No oxidation Why? 25°C H,O HCI No hydration Why? Benzene heat Br2 FeBr3 Why?H2/Ni Slow addition at hight temperature and pressure Br Why? Observed Not observe
13.3 Reactions of benzene Benzene Br2 / CCl 4 dark, 25 o C No addition of bromine KMnO2 / H2O 25 o C H2O, HCl heat H2 / Ni No hydration No oxidation Slow addition at hight temperature and pressure Why? Why? Why? Why? Br2 FeBr3 Br Br Br Observed Not observed Why?
13 4 The Kekule structure for benzene苯的克库勒结构 In 1865, Kekule, the originator of the structural theory, proposed the first definite structure for benzene, a structure that is still used today. Kekule suggested that the carbon atoms of benzene are in a ring, that they are bonded to each other by alternating single and double bonds, that one hydrogen atom is attach to each carbon atom
13.4 The Kekule Structure for benzene 苯的克库勒结构 In 1865，Kekule, the originator of the structural theory, proposed the first definite structure for benzene, a structure that is still used today. Kekule suggested that the carbon atoms of benzene are in a ring, that they are bonded to each other by alternating single and double bonds, that one hydrogen atom is attach to each carbon atom
The Kekule formula for benzene 苯的克库勒式 c C H克库勒的共振结构式H
The Kekule formula for benzene 苯的克库勒式 or C C C C C C H H H H H H C C C C C C H H H H H H C C C C C C H H H H H H 克 库 勒 的 共 振 结 构 式
克库勒的共振结构式 Br No isomer Br Br ame compound Br 同一物
克 库 勒 的 共 振 结 构 式 Br Br Br Br No isomer Same compound 同 一 物