试比较下列烯烃的稳定性请说明原理.

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试比较下列烯烃的稳定性请说明原理.试比较下列烯烃的稳定性请说明原理.试比较下列烯烃的稳定性请说明原理.烯烃取代基越多越稳定:b>c>aStability:Thereare3factorsthatinf

试比较下列烯烃的稳定性请说明原理.
试比较下列烯烃的稳定性
请说明原理.

试比较下列烯烃的稳定性请说明原理.
烯烃取代基越多越稳定:
b>c>a
Stability:
There are 3 factors that influence alkene stability:
1.Degree of substitution:more highly alkylated alkenes are more stable,so tetra > tri > di > mono-substituted.
烷基取代基越多越稳定:四取代>三取代>二取代>单取代.
2.Stereochemistry:trans > cis due to reduced steric interactions when R groups are on opposite sides of the double bond.
反式>顺式.
3.Conjugated alkenes are more stable than isolated alkenes.
共轭>不共轭.

c>b>a