CHAPTER 6 ALKENE SEMESTER 2

                                                   

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 1. Alkyl carbocation

Primary carbocation: R-CH₂⁺
      Secondary carbocation(R)2CH⁺
Tertiary carbocation: (R)₃C⁺

Carbocation
StabilitCH₃⁽⁺⁾   <CH₃CH₂⁽⁺⁾<    (CH₃)₂C⁾<         (CH₃)₃C⁽⁺⁾

 

GEOMETRICAL ISOMERS

 

 

 

    

The essential requirement for this stereoisomerism is that each carbon of the double bond must have two different substituent groups (one may be hydrogen). 

1. Alkyl carbocation

Primary carbocation: R-CH₂⁺
      Secondary carbocation(R)2CH⁺
Tertiary carbocation: (R)₃C⁺

Carbocation Stability	CH3(+)	<	CH3CH2(+)	<	(CH3)2C)			<			(CH3)3C(+)

 

  

http://www.chemguide.co.uk/organicprops/alkenes/background.html

http://www.bbc.co.uk/schools/gcsebitesize/science/ocr_gateway/carbon_chemistry/making_polymersrev2.shtml

http://chemwiki.ucdavis.edu/Organic_Chemistry/Hydrocarbons/Alkenes