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  • Predict all the alkenes that would be formed by dehydrohalogenation of the following halides with sodium ethoxide in ethanol and identify the major alkene: (iii) 2, 2,3-Trimethyl -3- bromopentane

10.10     Predict all the alkenes that would be formed by dehydrohalogenation of the following halides with sodium ethoxide in ethanol and identify the  major alkene: 

          (iii)     2,2,3-Trimethyl-3-bromopentane

Answers (1)

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(iii)     

                                         

 In this compound we have two type of \beta - hydrogen thus dehalogenation we get two types of products namely 3, 4, 4-Trimethylpent-2-ene and 2-Ethyl-3,3-dimethylbut-2-ene.

                    and               

Here 3, 4, 4-Trimethylpent-2-ene will be major product, since the \alpha - hydrogen attached to the double bond are greater.

Posted by

Devendra Khairwa

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