Predict all the alkenes that would be formed by dehydrohalogenation of the following halides with sodium ethoxide in ethanol and identify the major alkene:
(i) 1-Bromo-1-methylcyclohexane , (ii) 2-Chloro-2-methylbutane
(iii) 2,2,3-Trimethyl-3-bromopentane

Explanation

To predict the alkenes formed by the dehydrohalogenation of the given halides using sodium ethoxide in ethanol, we will follow these steps for each compound:

### (i) 1-Bromo-1-methylcyclohexane

1. **Identify the structure**: The structure of 1-bromo-1-methylcyclohexane has a bromine atom and a methyl group both attached to the first carbon of the cyclohexane ring.

2. **Determine alpha and beta carbons**: The carbon with the bromine is the alpha carbon. The adjacent carbons in the cyclohexane ring are the beta carbons.

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