Question

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

1-bromo-1-menthylcyclohexane

2 -chloro-2-methylbutane

3-bromo- 2,2,3-Trimethylpentane.

Answer 1

1 - bromo-1-methylcyclohexane has two $\beta$ - hydrogen atomw.

So, two products will be formed.

Note Saytzff's rule : The product is preferred in which the carbon atoms joined by double bond are more alkyl substituted or alkylated.