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Home  >>  JEEMAIN and NEET  >>  Chemistry  >>  Hydrocarbons

Which of the following will have least hindered rotation about carbon-carbon bond?

$\begin{array}{1 1}(a)\;\text{Ethane}\\(b)\; \text{Ethylene}\\(c)\;\text{Acetylene}\\(d)\;\text{Hexachloroethane}\end{array}$

1 Answer

In ethylene there is restricted rotation where as in accetylene there is no rotation.Hexachloromethane has more rotation than ethylene but less than ethane because of larger size of chlorine atoms present in it than those of hydrogen atoms in ethane.
Hence (a) is the correct option.
answered Mar 18, 2014 by sreemathi.v
madam...he asked which of the following has the least ...

so i think hexacholoroethane should be correct option
 

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