烯烃的同分异构现象
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烯烃的同分异构现象. 孙默 丽泽中学 高二化学 2013.8.29. 1827 李比希 1828 维勒 1830 贝采里乌斯. 氰酸( HNCO ) 雷酸( HCNO ). 同分异性→同分异构. 同分异构体的书写顺序. ⑴ 计算不饱和度 ⑵确定类别,写出异构 ⑶按每类写出碳链异构 ⑷在相同碳链中,找位置异构. a b. a a. ∕. ∕. ﹨. ﹨. C = C. C = C. ﹨. ﹨. ∕. ∕. b a. b b.

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烯烃的同分异构现象

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3559185

烯烃的同分异构现象

孙默

丽泽中学 高二化学

2013.8.29


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1827李比希 1828维勒 1830贝采里乌斯

氰酸(HNCO)

雷酸(HCNO)

同分异性→同分异构


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同分异构体的书写顺序

  • ⑴计算不饱和度

  • ⑵确定类别,写出异构

  • ⑶按每类写出碳链异构

  • ⑷在相同碳链中,找位置异构


A b a b

a b

a a

C = C

C = C

b a

b b

当每个双键碳两端所连接的基团是a、b时,请你写出用a、b表示的顺反异构:

顺式 反式


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顺反异构的性质差异

顺巴豆酸味辛竦,

而反巴豆酸味甜;

顺丁烯二酸有毒,

而反丁烯二酸无毒;


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橡胶

弹性好

弹性差


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