How will you explain that there exists two varieties of 1, 2,-dichloroethene while there is only one type of 1, 2-dichloroethane?
The structure of 1, 2-dichloroethene is
Since in the above structure there is C = C bond and two chlorine atoms are present at two different carbon atoms, therefore, it is capable of exhibiting geometrical isomerism. The two geometrical isomers (i.e. two varieties) of the above compound can be represented as:
The structure of 1, 2-dichloroethane is
The molecule has C-C bond. As the rotation of the atoms or groups about single bond is quite free, the compound fails to show geometrical isomerism.
Which of the following compounds will show cis-trans isomerism?
(i)(CH3)2C = CH-C2H5
(ii) CH2 = CBr2
(iii) C2H5CH = CH-CH2
(iv) CH3CH = CClCH3
Draw cis and trans isomers of the following compounds. Also, write their IUPAC names:
(i) CHCl = CHCl
(ii) C2H5CCH3 = CCH3C2H5
What happens when butan-2-ol is heated with concentrated H2SO4. Account for the product formed.
What happens when 2-Bromobutane is heated with alcoholic KOH. Account for the product formed.
Draw the cis and trans structures of hex-2-ene. Which isomer will have higher b.p. and why?
